[clang] Fix filename parsing in clang-format-diff.py for paths with spaces (PR #135779)

[Selim Keles via cfe-commits]

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@@ -102,9 +102,9 @@ def main():
     filename = None
     lines_by_file = {}
     for line in sys.stdin:
-        match = re.search(r"^\+\+\+\ (.*?/){%s}(\S*)" % args.p, line)
+        match = re.search(r"^\+\+\+\s+(?:.*?/){%s}(.+)$" % args.p, line)
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selimkeles wrote:

Made the change suggested, tested, working good. Messed up the PR with force push sorry about that.

https://github.com/llvm/llvm-project/pull/135779