[clang-tidy] fix(clang-tools-extra/**.py): fix invalid escape sequences (llvm#94028)

Author: e-kwsm

clang-tools-extra/clang-tidy/tool/clang-tidy-diff.py

@@ -242,7 +242,7 @@ def main():
     filename = None
     lines_by_file = {}
     for line in sys.stdin:
-        match = re.search('^\+\+\+\ "?(.*?/){%s}([^ \t\n"]*)' % args.p, line)
+        match = re.search('^\\+\\+\\+\\ "?(.*?/){%s}([^ \t\n"]*)' % args.p, line)
         if match:
             filename = match.group(2)
         if filename is None:
@@ -255,7 +255,7 @@ def main():
             if not re.match("^%s$" % args.iregex, filename, re.IGNORECASE):
                 continue
 
-        match = re.search("^@@.*\+(\d+)(,(\d+))?", line)
+        match = re.search(r"^@@.*\+(\d+)(,(\d+))?", line)
         if match:
             start_line = int(match.group(1))
             line_count = 1

clang-tools-extra/docs/clang-tidy/checks/gen-static-analyzer-docs.py

@@ -59,7 +59,7 @@ def get_checkers(checkers_td, checkers_rst):
             "clang-analyzer-" + checker_package_prefix + "." + checker_name
         )
         anchor_url = re.sub(
-            "\.", "-", checker_package_prefix + "." + checker_name
+            r"\.", "-", checker_package_prefix + "." + checker_name
         ).lower()
 
         if not hidden and "alpha" not in full_package_name.lower():