Port the fix for #13193 to packaging
diff --git a/Lib/packaging/manifest.py b/Lib/packaging/manifest.py
index adf4633..9826d29 100644
--- a/Lib/packaging/manifest.py
+++ b/Lib/packaging/manifest.py
@@ -366,10 +366,8 @@
# ditch end of pattern character
empty_pattern = _glob_to_re('')
prefix_re = _glob_to_re(prefix)[:-len(empty_pattern)]
- # match both path separators, as in Postel's principle
- sep_pat = "[" + re.escape(os.path.sep + os.path.altsep
- if os.path.altsep else os.path.sep) + "]"
- pattern_re = "^" + sep_pat.join([prefix_re, ".*" + pattern_re])
+ # paths should always use / in manifest templates
+ pattern_re = "^%s/.*%s" % (prefix_re, pattern_re)
else: # no prefix -- respect anchor flag
if anchor:
pattern_re = "^" + pattern_re