[clang-format] Recognize "hxx" as a C++ header in clang-format-diff.py

[vmiklos]

Summary

And shift "proto" to the next line to avoid a too long line.

[vmiklos]

Mydeveloperday, Sam: could you please take a look? Hopefully a trivial one. Thanks :-)

There are some larger codebases like LibreOffice that use .hxx as their header file extension, it's a bit inconsistent that .cxx is recognized but .hxx is not. This is meant to fix the issue.

[MyDeveloperDay]

LGTM

[vmiklos]

Thanks for the quick feedback!

clang/tools/clang-format/clang-format-diff.py

def main():
   parser.add_argument('-i', action='store_true', default=False,
                       help='apply edits to files instead of displaying a diff')
   parser.add_argument('-p', metavar='NUM', default=0,
                       help='strip the smallest prefix containing P slashes')
   parser.add_argument('-regex', metavar='PATTERN', default=None,
                       help='custom pattern selecting file paths to reformat '
                       '(case sensitive, overrides -iregex)')
   parser.add_argument('-iregex', metavar='PATTERN', default=
-                      r'.*\.(cpp|cc|c\+\+|cxx|c|cl|h|hh|hpp|m|mm|inc|js|ts|proto'
-                      r'|protodevel|java|cs)',
+                      r'.*\.(cpp|cc|c\+\+|cxx|c|cl|h|hh|hpp|hxx|m|mm|inc|js|ts'
+                      r'|proto|protodevel|java|cs)',
                       help='custom pattern selecting file paths to reformat '
                       '(case insensitive, overridden by -regex)')
   parser.add_argument('-sort-includes', action='store_true', default=False,
                       help='let clang-format sort include blocks')
   parser.add_argument('-v', '--verbose', action='store_true',
                       help='be more verbose, ineffective without -i')
   parser.add_argument('-style',
                       help='formatting style to apply (LLVM, GNU, Google, Chromium, '