Adapt test_exclude_recursive_negate

tests/demo_exclude_negate/bad/subdir/file.txt

@@ -1 +0,0 @@
-This file must not exist in copy.

tests/demo_exclude_negate/copier.yml

@@ -1,3 +1,3 @@
 _exclude:
-  - bad
-  - "!bad/good"
+  - "*.txt"
+  - "!copy_me.txt"

tests/test_exclude.py

@@ -12,8 +12,9 @@ def test_exclude_recursive(tmp_path):
 
 
 def test_exclude_recursive_negate(tmp_path):
-    """Copy is done properly when excluding recursively."""
+    """Copy is done properly when exclude is negated for copy_me.txt."""
     src = f"{PROJECT_TEMPLATE}_exclude_negate"
     copy(src, tmp_path)
-    assert (tmp_path / "bad").exists()
-    assert (tmp_path / "bad").is_dir()
+    assert (tmp_path / "copy_me.txt").exists()
+    assert (tmp_path / "copy_me.txt").is_file()
+    assert not (tmp_path / "do_not_copy_me.txt").exists()