Added empty negative lookahead in front of ranges which encompass path separator in fnmatch._translate().

Author: dmitrin9

Lib/fnmatch.py

@@ -160,7 +160,7 @@ def _translate(pat, star, question_mark):
                     add(question_mark)
                 else:
                     if question_mark != '.' and inside_range:
-                        add(f'(?={question_mark})')
+                        add(f'(?!)')
                     # Escape set operations (&&, ~~ and ||).
                     stuff = _re_setops_sub(r'\\\1', stuff)
                     if stuff[0] == '!':

Lib/test/test_glob.py

@@ -514,7 +514,7 @@ def fn(pat):
         self.assertEqual(fn('foo/bar\\baz'), r'(?s:foo[/\\]bar[/\\]baz)\Z')
         self.assertEqual(fn('**/*'), r'(?s:(?:.+[/\\])?[^/\\]+)\Z')
 
-        self.assertEqual(fn('foo[%-0]bar'), r'(?s:foo(?=[^/\\])[%-0]bar)\Z')
+        self.assertEqual(fn('foo[%-0]bar'), r'(?s:foo(?!)[%-0]bar)\Z')
 
 
 if __name__ == "__main__":