compileall: Normalize paths

Author: Alexpux

Lib/compileall.py

@@ -163,8 +163,8 @@ def compile_file(fullname, ddir=None, force=False, rx=None, quiet=0,
                           "in combination with stripdir or prependdir"))
 
     success = True
-    fullname = os.fspath(fullname)
-    stripdir = os.fspath(stripdir) if stripdir is not None else None
+    fullname = os.path.normpath(os.fspath(fullname))
+    stripdir = os.path.normpath(os.fspath(stripdir)) if stripdir is not None else None
     name = os.path.basename(fullname)
 
     dfile = None