The most common cases:
len(s) > 0
len(s) < 1
and they can be simplified to:
len(s) != 0
len(s) == 0
Fixes#48054
Change-Id: I16e5b0cffcfab62a4acc2a09977a6cd3543dd000
Reviewed-on: https://go-review.googlesource.com/c/go/+/346050
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
