[polly] fix(polly/**.py): fix invalid escape sequences (PR #94037)

[via llvm-commits]

github-actions[bot] wrote:

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:warning: Python code formatter, darker found issues in your code. :warning:

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``````````bash
darker --check --diff -r f372bb45e39b7eae94930fc419724e12596a8361...155443973b9dece6be29d602107a1552ecb369d6 polly/test/update_check.py
``````````

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View the diff from darker here.
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``````````diff
--- update_check.py	2024-06-23 12:06:52.000000 +0000
+++ update_check.py	2024-06-23 12:26:42.085716 +0000
@@ -220,11 +220,16 @@
         else:
             yield set()
         line = i.__next__()
 
 
-replrepl = {"{{": "{{[{][{]}}", "}}": "{{[}][}]}}", "[[": r"{{\[\[}}", "]]": r"{{\]\]}}"}
+replrepl = {
+    "{{": "{{[{][{]}}",
+    "}}": "{{[}][}]}}",
+    "[[": r"{{\[\[}}",
+    "]]": r"{{\]\]}}",
+}
 replre = re.compile("|".join(re.escape(k) for k in replrepl.keys()))
 
 
 def main():
     parser = argparse.ArgumentParser(description="Update CHECK lines")

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https://github.com/llvm/llvm-project/pull/94037