all: fix typos

Use the following (suboptimal) script to obtain a list of possible
typos:

  #!/usr/bin/env sh

  set -x

  git ls-files |\
    grep -e '\.\(c\|cc\|go\)$' |\
    xargs -n 1\
    awk\
    '/\/\// { gsub(/.*\/\//, ""); print; } /\/\*/, /\*\// { gsub(/.*\/\*/, ""); gsub(/\*\/.*/, ""); }' |\
    hunspell -d en_US -l |\
    grep '^[[:upper:]]\{0,1\}[[:lower:]]\{1,\}$' |\
    grep -v -e '^.\{1,4\}$' -e '^.\{16,\}$' |\
    sort -f |\
    uniq -c |\
    awk '$1 == 1 { print $2; }'

Then, go through the results manually and fix the most obvious typos in
the non-vendored code.

Change-Id: I3cb5830a176850e1a0584b8a40b47bde7b260eae
Reviewed-on: https://go-review.googlesource.com/c/go/+/193848
Reviewed-by: Robert Griesemer <gri@golang.org>

src/cmd/compile/internal/gc/const.go

@@ -1294,7 +1294,7 @@ type constSetKey struct {
 // equal value and identical type has already been added, then add
 // reports an error about the duplicate value.
 //
-// pos provides position information for where expression n occured
+// pos provides position information for where expression n occurred
 // (in case n does not have its own position information). what and
 // where are used in the error message.
 //

src/cmd/compile/internal/gc/escape.go

@@ -24,7 +24,7 @@ import (
 // First, we construct a directed weighted graph where vertices
 // (termed "locations") represent variables allocated by statements
 // and expressions, and edges represent assignments between variables
-// (with weights reperesenting addressing/dereference counts).
+// (with weights representing addressing/dereference counts).
 //
 // Next we walk the graph looking for assignment paths that might
 // violate the invariants stated above. If a variable v's address is
@@ -33,7 +33,7 @@ import (
 //
 // To support interprocedural analysis, we also record data-flow from
 // each function's parameters to the heap and to its result
-// parameters. This information is summarized as "paremeter tags",
+// parameters. This information is summarized as "parameter tags",
 // which are used at static call sites to improve escape analysis of
 // function arguments.
 
@@ -44,7 +44,7 @@ import (
 // "location."
 //
 // We also model every Go assignment as a directed edges between
-// locations. The number of derefence operations minus the number of
+// locations. The number of dereference operations minus the number of
 // addressing operations is recorded as the edge's weight (termed
 // "derefs"). For example:
 //

src/cmd/compile/internal/gc/main.go

@@ -570,7 +570,7 @@ func Main(archInit func(*Arch)) {
 			fcount++
 		}
 	}
-	// With all types ckecked, it's now safe to verify map keys. One single
+	// With all types checked, it's now safe to verify map keys. One single
 	// check past phase 9 isn't sufficient, as we may exit with other errors
 	// before then, thus skipping map key errors.
 	checkMapKeys()

src/cmd/compile/internal/gc/sinit.go

@@ -495,7 +495,7 @@ func isStaticCompositeLiteral(n *Node) bool {
 // literal components of composite literals.
 // Dynamic initialization represents non-literals and
 // non-literal components of composite literals.
-// LocalCode initializion represents initialization
+// LocalCode initialization represents initialization
 // that occurs purely in generated code local to the function of use.
 // Initialization code is sometimes generated in passes,
 // first static then dynamic.

src/cmd/compile/internal/gc/ssa.go

@@ -1645,7 +1645,7 @@ var fpConvOpToSSA32 = map[twoTypes]twoOpsAndType{
 	twoTypes{TFLOAT64, TUINT32}: twoOpsAndType{ssa.OpCvt64Fto32U, ssa.OpCopy, TUINT32},
 }
 
-// uint64<->float conversions, only on machines that have intructions for that
+// uint64<->float conversions, only on machines that have instructions for that
 var uint64fpConvOpToSSA = map[twoTypes]twoOpsAndType{
 	twoTypes{TUINT64, TFLOAT32}: twoOpsAndType{ssa.OpCopy, ssa.OpCvt64Uto32F, TUINT64},
 	twoTypes{TUINT64, TFLOAT64}: twoOpsAndType{ssa.OpCopy, ssa.OpCvt64Uto64F, TUINT64},

src/cmd/compile/internal/gc/syntax.go

@@ -691,7 +691,7 @@ const (
 	ORECV        // <-Left
 	ORUNESTR     // Type(Left) (Type is string, Left is rune)
 	OSELRECV     // Left = <-Right.Left: (appears as .Left of OCASE; Right.Op == ORECV)
-	OSELRECV2    // List = <-Right.Left: (apperas as .Left of OCASE; count(List) == 2, Right.Op == ORECV)
+	OSELRECV2    // List = <-Right.Left: (appears as .Left of OCASE; count(List) == 2, Right.Op == ORECV)
 	OIOTA        // iota
 	OREAL        // real(Left)
 	OIMAG        // imag(Left)

src/cmd/compile/internal/gc/walk.go

@@ -1265,7 +1265,7 @@ opswitch:
 			}
 			// Map initialization with a variable or large hint is
 			// more complicated. We therefore generate a call to
-			// runtime.makemap to intialize hmap and allocate the
+			// runtime.makemap to initialize hmap and allocate the
 			// map buckets.
 
 			// When hint fits into int, use makemap instead of

src/cmd/compile/internal/ssa/branchelim.go

@@ -319,7 +319,7 @@ func shouldElimIfElse(no, yes, post *Block, arch string) bool {
 		cost := phi * 1
 		if phi > 1 {
 			// If we have more than 1 phi and some values in post have args
-			// in yes or no blocks, we may have to recalucalte condition, because
+			// in yes or no blocks, we may have to recalculate condition, because
 			// those args may clobber flags. For now assume that all operations clobber flags.
 			cost += other * 1
 		}

src/cmd/compile/internal/ssa/deadstore.go

@@ -180,7 +180,7 @@ func elimDeadAutosGeneric(f *Func) {
 			}
 			return
 		case OpStore, OpMove, OpZero:
-			// v should be elimated if we eliminate the auto.
+			// v should be eliminated if we eliminate the auto.
 			n, ok := addr[args[0]]
 			if ok && elim[v] == nil {
 				elim[v] = n

src/cmd/compile/internal/ssa/debug_test.go

@@ -959,7 +959,7 @@ func replaceEnv(env []string, ev string, evv string) []string {
 }
 
 // asCommandLine renders cmd as something that could be copy-and-pasted into a command line
-// If cwd is not empty and different from the command's directory, prepend an approprirate "cd"
+// If cwd is not empty and different from the command's directory, prepend an appropriate "cd"
 func asCommandLine(cwd string, cmd *exec.Cmd) string {
 	s := "("
 	if cmd.Dir != "" && cmd.Dir != cwd {

src/cmd/compile/internal/ssa/gen/PPC64Ops.go

@@ -222,7 +222,7 @@ func init() {
 
 		{name: "POPCNTD", argLength: 1, reg: gp11, asm: "POPCNTD"}, // number of set bits in arg0
 		{name: "POPCNTW", argLength: 1, reg: gp11, asm: "POPCNTW"}, // number of set bits in each word of arg0 placed in corresponding word
-		{name: "POPCNTB", argLength: 1, reg: gp11, asm: "POPCNTB"}, // number of set bits in each byte of arg0 placed in corresonding byte
+		{name: "POPCNTB", argLength: 1, reg: gp11, asm: "POPCNTB"}, // number of set bits in each byte of arg0 placed in corresponding byte
 
 		{name: "FDIV", argLength: 2, reg: fp21, asm: "FDIV"},   // arg0/arg1
 		{name: "FDIVS", argLength: 2, reg: fp21, asm: "FDIVS"}, // arg0/arg1

src/cmd/compile/internal/ssa/gen/S390XOps.go

@@ -489,7 +489,7 @@ func init() {
 		{name: "LoweredPanicBoundsB", argLength: 3, aux: "Int64", reg: regInfo{inputs: []regMask{r1, r2}}, typ: "Mem"}, // arg0=idx, arg1=len, arg2=mem, returns memory. AuxInt contains report code (see PanicBounds in generic.go).
 		{name: "LoweredPanicBoundsC", argLength: 3, aux: "Int64", reg: regInfo{inputs: []regMask{r0, r1}}, typ: "Mem"}, // arg0=idx, arg1=len, arg2=mem, returns memory. AuxInt contains report code (see PanicBounds in generic.go).
 
-		// Constant conditon code values. The condition code can be 0, 1, 2 or 3.
+		// Constant condition code values. The condition code can be 0, 1, 2 or 3.
 		{name: "FlagEQ"}, // CC=0 (equal)
 		{name: "FlagLT"}, // CC=1 (less than)
 		{name: "FlagGT"}, // CC=2 (greater than)

src/cmd/compile/internal/ssa/gen/genericOps.go

@@ -484,7 +484,7 @@ var genericOps = []opData{
 
 	{name: "VarDef", argLength: 1, aux: "Sym", typ: "Mem", symEffect: "None", zeroWidth: true}, // aux is a *gc.Node of a variable that is about to be initialized.  arg0=mem, returns mem
 	{name: "VarKill", argLength: 1, aux: "Sym", symEffect: "None"},                             // aux is a *gc.Node of a variable that is known to be dead.  arg0=mem, returns mem
-	// TODO: what's the difference betweeen VarLive and KeepAlive?
+	// TODO: what's the difference between VarLive and KeepAlive?
 	{name: "VarLive", argLength: 1, aux: "Sym", symEffect: "Read", zeroWidth: true}, // aux is a *gc.Node of a variable that must be kept live.  arg0=mem, returns mem
 	{name: "KeepAlive", argLength: 2, typ: "Mem", zeroWidth: true},                  // arg[0] is a value that must be kept alive until this mark.  arg[1]=mem, returns mem
 

src/cmd/compile/internal/ssa/gen/main.go

@@ -74,7 +74,7 @@ type regInfo struct {
 	// clobbers encodes the set of registers that are overwritten by
 	// the instruction (other than the output registers).
 	clobbers regMask
-	// outpus[i] encodes the set of registers allowed for the i'th output.
+	// outputs[i] encodes the set of registers allowed for the i'th output.
 	outputs []regMask
 }
 
@@ -430,7 +430,7 @@ func (a arch) Name() string {
 //
 // Note that there is no limit on the concurrency at the moment. On a four-core
 // laptop at the time of writing, peak RSS usually reached ~230MiB, which seems
-// doable by practially any machine nowadays. If that stops being the case, we
+// doable by practically any machine nowadays. If that stops being the case, we
 // can cap this func to a fixed number of architectures being generated at once.
 func genLower() {
 	var wg sync.WaitGroup

src/cmd/compile/internal/ssa/gen/rulegen.go

@@ -396,7 +396,7 @@ type Node interface{}
 // ast.Stmt under some limited circumstances.
 type Statement interface{}
 
-// bodyBase is shared by all of our statement psuedo-node types which can
+// bodyBase is shared by all of our statement pseudo-node types which can
 // contain other statements.
 type bodyBase struct {
 	list    []Statement

src/cmd/compile/internal/ssa/loopbce.go

@@ -186,7 +186,7 @@ func findIndVar(f *Func) []indVar {
 			// Handle induction variables of these forms.
 			// KNN is known-not-negative.
 			// SIGNED ARITHMETIC ONLY. (see switch on b.Control.Op above)
-			// Possibilitis for KNN are len and cap; perhaps we can infer others.
+			// Possibilities for KNN are len and cap; perhaps we can infer others.
 			// for i := 0; i <= KNN-k    ; i += k
 			// for i := 0; i <  KNN-(k-1); i += k
 			// Also handle decreasing.

src/cmd/compile/internal/ssa/regalloc.go

@@ -411,7 +411,7 @@ func (s *regAllocState) allocReg(mask regMask, v *Value) register {
 
 	if s.f.Config.ctxt.Arch.Arch == sys.ArchWasm {
 		// TODO(neelance): In theory this should never happen, because all wasm registers are equal.
-		// So if there is still a free register, the allocation should have picked that one in the first place insead of
+		// So if there is still a free register, the allocation should have picked that one in the first place instead of
 		// trying to kick some other value out. In practice, this case does happen and it breaks the stack optimization.
 		s.freeReg(r)
 		return r
@@ -489,7 +489,7 @@ func (s *regAllocState) allocValToReg(v *Value, mask regMask, nospill bool, pos
 	}
 
 	var r register
-	// If nospill is set, the value is used immedately, so it can live on the WebAssembly stack.
+	// If nospill is set, the value is used immediately, so it can live on the WebAssembly stack.
 	onWasmStack := nospill && s.f.Config.ctxt.Arch.Arch == sys.ArchWasm
 	if !onWasmStack {
 		// Allocate a register.

src/cmd/compile/internal/ssa/sparsetree.go

@@ -223,7 +223,7 @@ func (t SparseTree) domorder(x *Block) int32 {
 	// entry(x) < entry(y) allows cases x-dom-y and x-then-y.
 	// But by supposition, x does not dominate y. So we have x-then-y.
 	//
-	// For contractidion, assume x dominates z.
+	// For contradiction, assume x dominates z.
 	// Then entry(x) < entry(z) < exit(z) < exit(x).
 	// But we know x-then-y, so entry(x) < exit(x) < entry(y) < exit(y).
 	// Combining those, entry(x) < entry(z) < exit(z) < exit(x) < entry(y) < exit(y).

src/cmd/go/go_test.go

@@ -206,7 +206,7 @@ func TestMain(m *testing.M) {
 		// (installed in GOROOT/pkg/tool/GOOS_GOARCH).
 		// If these are not the same toolchain, then the entire standard library
 		// will look out of date (the compilers in those two different tool directories
-		// are built for different architectures and have different buid IDs),
+		// are built for different architectures and have different build IDs),
 		// which will cause many tests to do unnecessary rebuilds and some
 		// tests to attempt to overwrite the installed standard library.
 		// Bail out entirely in this case.

src/cmd/go/internal/modfetch/coderepo.go

@@ -632,7 +632,7 @@ func (r *codeRepo) findDir(version string) (rev, dir string, gomod []byte, err e
 		// the real module, found at a different path, usable only in
 		// a replace directive.
 		//
-		// TODO(bcmills): This doesn't seem right. Investigate futher.
+		// TODO(bcmills): This doesn't seem right. Investigate further.
 		// (Notably: why can't we replace foo/v2 with fork-of-foo/v3?)
 		dir2 := path.Join(r.codeDir, r.pathMajor[1:])
 		file2 = path.Join(dir2, "go.mod")

src/cmd/go/internal/search/search.go

@@ -241,7 +241,7 @@ func TreeCanMatchPattern(pattern string) func(name string) bool {
 //
 // First, /... at the end of the pattern can match an empty string,
 // so that net/... matches both net and packages in its subdirectories, like net/http.
-// Second, any slash-separted pattern element containing a wildcard never
+// Second, any slash-separated pattern element containing a wildcard never
 // participates in a match of the "vendor" element in the path of a vendored
 // package, so that ./... does not match packages in subdirectories of
 // ./vendor or ./mycode/vendor, but ./vendor/... and ./mycode/vendor/... do.

src/cmd/go/internal/search/search_test.go

@@ -33,7 +33,7 @@ var matchPatternTests = `
 	match net net/http
 	not not/http not/net/http netchan
 
-	# Second, any slash-separted pattern element containing a wildcard never
+	# Second, any slash-separated pattern element containing a wildcard never
 	# participates in a match of the "vendor" element in the path of a vendored
 	# package, so that ./... does not match packages in subdirectories of
 	# ./vendor or ./mycode/vendor, but ./vendor/... and ./mycode/vendor/... do.

src/cmd/go/internal/sumweb/client.go

@@ -107,7 +107,7 @@ func NewConn(client Client) *Conn {
 	}
 }
 
-// init initiailzes the conn (if not already initialized)
+// init initializes the conn (if not already initialized)
 // and returns any initialization error.
 func (c *Conn) init() error {
 	c.initOnce.Do(c.initWork)

src/cmd/go/internal/tlog/tlog.go

@@ -121,7 +121,7 @@ func NodeHash(left, right Hash) Hash {
 func StoredHashIndex(level int, n int64) int64 {
 	// Level L's n'th hash is written right after level L+1's 2n+1'th hash.
 	// Work our way down to the level 0 ordering.
-	// We'll add back the orignal level count at the end.
+	// We'll add back the original level count at the end.
 	for l := level; l > 0; l-- {
 		n = 2*n + 1
 	}
@@ -155,7 +155,7 @@ func SplitStoredHashIndex(index int64) (level int, n int64) {
 		n++
 		indexN = x
 	}
-	// The hash we want was commited with record n,
+	// The hash we want was committed with record n,
 	// meaning it is one of (0, n), (1, n/2), (2, n/4), ...
 	level = int(index - indexN)
 	return level, n >> uint(level)

src/cmd/go/internal/work/action.go

@@ -702,7 +702,7 @@ func (b *Builder) addInstallHeaderAction(a *Action) {
 }
 
 // buildmodeShared takes the "go build" action a1 into the building of a shared library of a1.Deps.
-// That is, the input a1 represents "go build pkgs" and the result represents "go build -buidmode=shared pkgs".
+// That is, the input a1 represents "go build pkgs" and the result represents "go build -buildmode=shared pkgs".
 func (b *Builder) buildmodeShared(mode, depMode BuildMode, args []string, pkgs []*load.Package, a1 *Action) *Action {
 	name, err := libname(args, pkgs)
 	if err != nil {

src/cmd/go/internal/work/gccgo.go

@@ -332,7 +332,7 @@ func (tools gccgoToolchain) link(b *Builder, root *Action, out, importcfg string
 		}
 
 		if haveShlib[filepath.Base(a.Target)] {
-			// This is a shared library we want to link againt.
+			// This is a shared library we want to link against.
 			if !addedShlib[a.Target] {
 				shlibs = append(shlibs, a.Target)
 				addedShlib[a.Target] = true

src/cmd/internal/obj/arm64/asm7.go

@@ -1561,7 +1561,7 @@ func rclass(r int16) int {
 	return C_GOK
 }
 
-// con32class reclassifies the constant of 32-bit instruction. Becuase the constant type is 32-bit,
+// con32class reclassifies the constant of 32-bit instruction. Because the constant type is 32-bit,
 // but saved in Offset which type is int64, con32class treats it as uint32 type and reclassifies it.
 func (c *ctxt7) con32class(a *obj.Addr) int {
 	v := uint32(a.Offset)

src/cmd/internal/obj/objfile.go

@@ -658,7 +658,7 @@ func (ctxt *Link) DwarfAbstractFunc(curfn interface{}, s *LSym, myimportpath str
 	}
 }
 
-// This table is designed to aid in the creation of references betweeen
+// This table is designed to aid in the creation of references between
 // DWARF subprogram DIEs.
 //
 // In most cases when one DWARF DIE has to refer to another DWARF DIE,

src/cmd/internal/obj/x86/asm6.go

@@ -3055,7 +3055,7 @@ func (ab *AsmBuf) Put(b []byte) {
 }
 
 // PutOpBytesLit writes zero terminated sequence of bytes from op,
-// starting at specified offsed (e.g. z counter value).
+// starting at specified offset (e.g. z counter value).
 // Trailing 0 is not written.
 //
 // Intended to be used for literal Z cases.

src/cmd/link/internal/ld/pe.go

@@ -297,7 +297,7 @@ type peStringTable struct {
 	stringsLen int
 }
 
-// size resturns size of string table t.
+// size returns size of string table t.
 func (t *peStringTable) size() int {
 	// string table starts with 4-byte length at the beginning
 	return t.stringsLen + 4

src/cmd/link/internal/ld/xcoff.go

@@ -628,7 +628,7 @@ func logBase2(a int) uint8 {
 	return uint8(bits.Len(uint(a)) - 1)
 }
 
-// Write symbols needed when a new file appared :
+// Write symbols needed when a new file appeared:
 // - a C_FILE with one auxiliary entry for its name
 // - C_DWARF symbols to provide debug information
 // - a C_HIDEXT which will be a csect containing all of its functions
@@ -663,7 +663,7 @@ func (f *xcoffFile) writeSymbolNewFile(ctxt *Link, name string, firstEntry uint6
 			// Find the size of this corresponding package DWARF compilation unit.
 			// This size is set during DWARF generation (see dwarf.go).
 			dwsize = getDwsectCUSize(sect.Name, name)
-			// .debug_abbrev is commun to all packages and not found with the previous function
+			// .debug_abbrev is common to all packages and not found with the previous function
 			if sect.Name == ".debug_abbrev" {
 				s := ctxt.Syms.ROLookup(sect.Name, 0)
 				dwsize = uint64(s.Size)
@@ -779,7 +779,7 @@ func (f *xcoffFile) writeSymbolFunc(ctxt *Link, x *sym.Symbol) []xcoffSym {
 		// in the current file.
 		// Same goes for runtime.text.X symbols.
 	} else if x.File == "" { // Undefined global symbol
-		// If this happens, the algorithme must be redone.
+		// If this happens, the algorithm must be redone.
 		if currSymSrcFile.name != "" {
 			Exitf("undefined global symbol found inside another file")
 		}

src/crypto/tls/handshake_client.go

@@ -991,7 +991,7 @@ func mutualProtocol(protos, preferenceProtos []string) (string, bool) {
 	return protos[0], true
 }
 
-// hostnameInSNI converts name into an approriate hostname for SNI.
+// hostnameInSNI converts name into an appropriate hostname for SNI.
 // Literal IP addresses and absolute FQDNs are not permitted as SNI values.
 // See RFC 6066, Section 3.
 func hostnameInSNI(name string) string {

src/crypto/tls/prf.go

@@ -263,7 +263,7 @@ func (h *finishedHash) discardHandshakeBuffer() {
 }
 
 // noExportedKeyingMaterial is used as a value of
-// ConnectionState.ekm when renegotation is enabled and thus
+// ConnectionState.ekm when renegotiation is enabled and thus
 // we wish to fail all key-material export requests.
 func noExportedKeyingMaterial(label string, context []byte, length int) ([]byte, error) {
 	return nil, errors.New("crypto/tls: ExportKeyingMaterial is unavailable when renegotiation is enabled")

src/crypto/x509/name_constraints_test.go

@@ -1457,7 +1457,7 @@ var nameConstraintsTests = []nameConstraintsTest{
 	// that we can process CA certificates in the wild that have invalid SANs.
 	// See https://github.com/golang/go/issues/23995
 
-	// #77: an invalid DNS or mail SAN will not be detected if name constaint
+	// #77: an invalid DNS or mail SAN will not be detected if name constraint
 	// checking is not triggered.
 	{
 		roots: make([]constraintsSpec, 1),

src/database/sql/convert.go

@@ -565,7 +565,7 @@ func callValuerValue(vr driver.Valuer) (v driver.Value, err error) {
 // coefficient (also known as a significand) as a []byte, and an int32 exponent.
 // These are composed into a final value as "decimal = (neg) (form=finite) coefficient * 10 ^ exponent".
 // A zero length coefficient is a zero value.
-// The big-endian integer coefficent stores the most significant byte first (at coefficent[0]).
+// The big-endian integer coefficient stores the most significant byte first (at coefficient[0]).
 // If the form is not finite the coefficient and exponent should be ignored.
 // The negative parameter may be set to true for any form, although implementations are not required
 // to respect the negative parameter in the non-finite form.

src/database/sql/convert_test.go

@@ -525,7 +525,7 @@ func (d *dec) Compose(form byte, negative bool, coefficient []byte, exponent int
 	// This isn't strictly correct, as the extra bytes could be all zero,
 	// ignore this for this test.
 	if len(coefficient) > 16 {
-		return fmt.Errorf("coefficent too large")
+		return fmt.Errorf("coefficient too large")
 	}
 	copy(d.coefficient[:], coefficient)
 
@@ -558,7 +558,7 @@ func (d *decFinite) Compose(form byte, negative bool, coefficient []byte, expone
 	// This isn't strictly correct, as the extra bytes could be all zero,
 	// ignore this for this test.
 	if len(coefficient) > 16 {
-		return fmt.Errorf("coefficent too large")
+		return fmt.Errorf("coefficient too large")
 	}
 	copy(d.coefficient[:], coefficient)
 

src/database/sql/sql.go

@@ -2040,7 +2040,7 @@ func (tx *Tx) grabConn(ctx context.Context) (*driverConn, releaseConn, error) {
 		return nil, nil, ctx.Err()
 	}
 
-	// closeme.RLock must come before the check for isDone to prevent the Tx from
+	// closemu.RLock must come before the check for isDone to prevent the Tx from
 	// closing while a query is executing.
 	tx.closemu.RLock()
 	if tx.isDone() {

src/database/sql/sql_test.go

@@ -3783,7 +3783,7 @@ func (c *ctxOnlyConn) ExecContext(ctx context.Context, q string, args []driver.N
 // TestQueryExecContextOnly ensures drivers only need to implement QueryContext
 // and ExecContext methods.
 func TestQueryExecContextOnly(t *testing.T) {
-	// Ensure connection does not implment non-context interfaces.
+	// Ensure connection does not implement non-context interfaces.
 	var connType driver.Conn = &ctxOnlyConn{}
 	if _, ok := connType.(driver.Execer); ok {
 		t.Fatalf("%T must not implement driver.Execer", connType)

src/debug/pe/file_test.go

@@ -215,7 +215,7 @@ var fileTests = []fileTest{
 		// testdata/vmlinuz-4.15.0-47-generic is a trimmed down version of Linux Kernel image.
 		// The original Linux Kernel image is about 8M and it is not recommended to add such a big binary file to the repo.
 		// Moreover only a very small portion of the original Kernel image was being parsed by debug/pe package.
-		// Inorder to indentify this portion, the original image was first parsed by modified debug/pe package.
+		// In order to identify this portion, the original image was first parsed by modified debug/pe package.
 		// Modification essentially communicated reader's positions before and after parsing.
 		// Finally, bytes between those positions where written to a separate file,
 		// generating trimmed down version Linux Kernel image used in this test case.

src/encoding/base32/base32.go

@@ -302,7 +302,7 @@ func (enc *Encoding) decode(dst, src []byte) (n int, end bool, err error) {
 					// We have reached the end and are missing padding
 					return n, false, CorruptInputError(olen - len(src) - j)
 				}
-				// We have reached the end and are not expecing any padding
+				// We have reached the end and are not expecting any padding
 				dlen, end = j, true
 				break
 			}

src/go/build/build.go

@@ -981,7 +981,7 @@ Found:
 var errNoModules = errors.New("not using modules")
 
 // importGo checks whether it can use the go command to find the directory for path.
-// If using the go command is not appopriate, importGo returns errNoModules.
+// If using the go command is not appropriate, importGo returns errNoModules.
 // Otherwise, importGo tries using the go command and reports whether that succeeded.
 // Using the go command lets build.Import and build.Context.Import find code
 // in Go modules. In the long term we want tools to use go/packages (currently golang.org/x/tools/go/packages),

src/go/types/builtins.go

@@ -362,7 +362,7 @@ func (check *Checker) builtin(x *operand, call *ast.CallExpr, id builtinId) (_ b
 		// convert or check untyped argument
 		if isUntyped(x.typ) {
 			if x.mode == constant_ {
-				// an untyped constant number can alway be considered
+				// an untyped constant number can always be considered
 				// as a complex constant
 				if isNumeric(x.typ) {
 					x.typ = Typ[UntypedComplex]

src/go/types/call.go

@@ -439,7 +439,7 @@ func (check *Checker) selector(x *operand, e *ast.SelectorExpr) {
 				// Verify that LookupFieldOrMethod and MethodSet.Lookup agree.
 				// TODO(gri) This only works because we call LookupFieldOrMethod
 				// _before_ calling NewMethodSet: LookupFieldOrMethod completes
-				// any incomplete interfaces so they are avaible to NewMethodSet
+				// any incomplete interfaces so they are available to NewMethodSet
 				// (which assumes that interfaces have been completed already).
 				typ := x.typ
 				if x.mode == variable {

src/image/gif/writer_test.go

@@ -52,7 +52,7 @@ func averageDelta(m0, m1 image.Image) int64 {
 }
 
 // averageDeltaBounds returns the average delta in RGB space. The average delta is
-// calulated in the specified bounds.
+// calculated in the specified bounds.
 func averageDeltaBound(m0, m1 image.Image, b0, b1 image.Rectangle) int64 {
 	var sum, n int64
 	for y := b0.Min.Y; y < b0.Max.Y; y++ {

src/internal/bytealg/count_ppc64x.s

@@ -49,7 +49,7 @@ TEXT countbytebody<>(SB), NOSPLIT|NOFRAME, $0-0
 cmploop:
 	LXVW4X (R3), VS32 // load bytes from string
 
-	// when the bytes match, the corresonding byte contains all 1s
+	// when the bytes match, the corresponding byte contains all 1s
 	VCMPEQUB V1, V0, V2     // compare bytes
 	VPOPCNTD V2, V3         // each double word contains its count
 	VADDUDM  V3, V5, V5     // accumulate bit count in each double word

src/internal/cpu/cpu.go

@@ -160,7 +160,7 @@ type option struct {
 
 // processOptions enables or disables CPU feature values based on the parsed env string.
 // The env string is expected to be of the form cpu.feature1=value1,cpu.feature2=value2...
-// where feature names is one of the architecture specifc list stored in the
+// where feature names is one of the architecture specific list stored in the
 // cpu packages options variable and values are either 'on' or 'off'.
 // If env contains cpu.all=off then all cpu features referenced through the options
 // variable are disabled. Other feature names and values result in warning messages.

src/math/big/int.go

@@ -468,7 +468,7 @@ func (x *Int) TrailingZeroBits() uint {
 // If m == nil or m == 0, z = x**y unless y <= 0 then z = 1. If m > 0, y < 0,
 // and x and n are not relatively prime, z is unchanged and nil is returned.
 //
-// Modular exponentation of inputs of a particular size is not a
+// Modular exponentiation of inputs of a particular size is not a
 // cryptographically constant-time operation.
 func (z *Int) Exp(x, y, m *Int) *Int {
 	// See Knuth, volume 2, section 4.6.3.

src/net/http/transport.go

@@ -437,7 +437,7 @@ func (tr *transportRequest) setError(err error) {
 	tr.mu.Unlock()
 }
 
-// useRegisteredProtocol reports whether an alternate protocol (as reqistered
+// useRegisteredProtocol reports whether an alternate protocol (as registered
 // with Transport.RegisterProtocol) should be respected for this request.
 func (t *Transport) useRegisteredProtocol(req *Request) bool {
 	if req.URL.Scheme == "https" && req.requiresHTTP1() {
@@ -1903,7 +1903,7 @@ func (pc *persistConn) readLoop() {
 			}
 			return
 		}
-		pc.readLimit = maxInt64 // effictively no limit for response bodies
+		pc.readLimit = maxInt64 // effectively no limit for response bodies
 
 		pc.mu.Lock()
 		pc.numExpectedResponses--

src/net/interface_unix_test.go

@@ -186,7 +186,7 @@ func TestInterfaceArrivalAndDepartureZoneCache(t *testing.T) {
 	}
 
 	// Ensure zoneCache is filled:
-	_, _ = Listen("tcp", "[fe80::1%nonexistant]:0")
+	_, _ = Listen("tcp", "[fe80::1%nonexistent]:0")
 
 	ti := &testInterface{local: "fe80::1"}
 	if err := ti.setLinkLocal(0); err != nil {
@@ -200,7 +200,7 @@ func TestInterfaceArrivalAndDepartureZoneCache(t *testing.T) {
 	time.Sleep(3 * time.Millisecond)
 
 	// If Listen fails (on Linux with “bind: invalid argument”), zoneCache was
-	// not updated when encountering a nonexistant interface:
+	// not updated when encountering a nonexistent interface:
 	ln, err := Listen("tcp", "[fe80::1%"+ti.name+"]:0")
 	if err != nil {
 		t.Fatal(err)

src/net/url/url.go

@@ -449,7 +449,7 @@ func getscheme(rawurl string) (scheme, path string, err error) {
 	return "", rawurl, nil
 }
 
-// split slices s into two substrings separated by the first occurence of
+// split slices s into two substrings separated by the first occurrence of
 // sep. If cutc is true then sep is included with the second substring.
 // If sep does not occur in s then s and the empty string is returned.
 func split(s string, sep byte, cutc bool) (string, string) {

src/os/file.go

@@ -250,7 +250,7 @@ func Mkdir(name string, perm FileMode) error {
 	return nil
 }
 
-// setStickyBit adds ModeSticky to the permision bits of path, non atomic.
+// setStickyBit adds ModeSticky to the permission bits of path, non atomic.
 func setStickyBit(name string) error {
 	fi, err := Stat(name)
 	if err != nil {

src/runtime/map_benchmark_test.go

@@ -251,7 +251,7 @@ func BenchmarkMapLast(b *testing.B) {
 }
 
 func BenchmarkMapCycle(b *testing.B) {
-	// Arrange map entries to be a permuation, so that
+	// Arrange map entries to be a permutation, so that
 	// we hit all entries, and one lookup is data dependent
 	// on the previous lookup.
 	const N = 3127

src/runtime/mgcscavenge.go

@@ -74,7 +74,7 @@ func heapRetained() uint64 {
 // its rate and RSS goal.
 //
 // The RSS goal is based on the current heap goal with a small overhead
-// to accomodate non-determinism in the allocator.
+// to accommodate non-determinism in the allocator.
 //
 // The pacing is based on scavengePageRate, which applies to both regular and
 // huge pages. See that constant for more information.

src/runtime/os2_aix.go

@@ -6,7 +6,7 @@
 // Pollset syscalls are in netpoll_aix.go.
 // The implementation is based on Solaris and Windows.
 // Each syscall is made by calling its libc symbol using asmcgocall and asmsyscall6
-// asssembly functions.
+// assembly functions.
 
 package runtime
 

src/runtime/os_windows.go

@@ -775,7 +775,7 @@ func newosproc(mp *m) {
 func newosproc0(mp *m, stk unsafe.Pointer) {
 	// TODO: this is completely broken. The args passed to newosproc0 (in asm_amd64.s)
 	// are stacksize and function, not *m and stack.
-	// Check os_linux.go for an implemention that might actually work.
+	// Check os_linux.go for an implementation that might actually work.
 	throw("bad newosproc0")
 }
 

src/runtime/pprof/label_test.go

@@ -24,7 +24,7 @@ func (s labelSorter) Swap(i, j int)      { s[i], s[j] = s[j], s[i] }
 func (s labelSorter) Less(i, j int) bool { return s[i].key < s[j].key }
 
 func TestContextLabels(t *testing.T) {
-	// Background context starts with no lablels.
+	// Background context starts with no labels.
 	ctx := context.Background()
 	labels := labelsSorted(ctx)
 	if len(labels) != 0 {

test/closure2.go

@@ -74,7 +74,7 @@ func main() {
 		for i := range [2]int{} {
 			if i == 0 {
 				g = func() int {
-					return i // test that we capture by ref here, i is mutated on every interation
+					return i // test that we capture by ref here, i is mutated on every interaction
 				}
 			}
 		}

test/finprofiled.go

@@ -36,7 +36,7 @@ func main() {
 		}
 	}
 	// Finalize as much as possible.
-	// Note: the sleep only increases probility of bug detection,
+	// Note: the sleep only increases probability of bug detection,
 	// it cannot lead to false failure.
 	for i := 0; i < 5; i++ {
 		runtime.GC()

test/fixedbugs/issue24339.go

@@ -6,7 +6,7 @@
 
 package p
 
-// Use a diffent line number for each token so we can
+// Use a different line number for each token so we can
 // check that the error message appears at the correct
 // position.
 var _ = struct{}{ /*line :20:1*/foo /*line :21:1*/: /*line :22:1*/0 }

test/index.go

@@ -251,7 +251,7 @@ func main() {
 		if c == "" && (i == "fgood" || i == "fbad") {
 			return
 		}
-		// Integral float constat is ok.
+		// Integral float constant is ok.
 		if c == "c" && n == "" && i == "fgood" {
 			if pass == 0 {
 				fmt.Fprintf(b, "\tuse(%s[%s])\n", pae, cni)

test/ken/modconst.go

@@ -4,7 +4,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// Test integer modulus by contstants.
+// Test integer modulus by constants.
 
 package main
 

test/opt_branchlikely.go

@@ -1,6 +1,6 @@
 // +build amd64
 // errorcheck -0 -d=ssa/likelyadjust/debug=1,ssa/insert_resched_checks/off
-// rescheduling check insertion is turend off because the inserted conditional branches perturb the errorcheck
+// rescheduling check insertion is turned off because the inserted conditional branches perturb the errorcheck
 
 // Copyright 2016 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style

test/strength.go

@@ -5,7 +5,7 @@
 // license that can be found in the LICENSE file.
 
 // Generate test of strength reduction for multiplications
-// with contstants. Especially useful for amd64/386.
+// with constants. Especially useful for amd64/386.
 
 package main