bpo-38347: find pathfix for Python scripts whose name contain a '-' (GH-16536)

 pathfix.py: Assume all files that end on '.py' are Python scripts when working recursively. 
diff --git a/Tools/scripts/pathfix.py b/Tools/scripts/pathfix.py
index 237a3d9..d252321 100755
--- a/Tools/scripts/pathfix.py
+++ b/Tools/scripts/pathfix.py
@@ -89,11 +89,8 @@
     sys.exit(bad)
 
 
-ispythonprog = re.compile(r'^[a-zA-Z0-9_]+\.py$')
-
-
 def ispython(name):
-    return bool(ispythonprog.match(name))
+    return name.endswith('.py')
 
 
 def recursedown(dirname):