[clang-format] [PR45126] Help text is missing all available formats

[MyDeveloperDay]

Summary

https://bugs.llvm.org/show_bug.cgi?id=45126

GNU and Microsoft styles are built in supported styles but are not displayed in the help text

clang/lib/Format/Format.cpp

LangOptions getFormattingLangOpts(const FormatStyle &Style) {
   LangOpts.ObjC = 1;
   LangOpts.MicrosoftExt = 1;    // To get kw___try, kw___finally.
   LangOpts.DeclSpecKeyword = 1; // To get __declspec.
   return LangOpts;
 }
 
 const char *StyleOptionHelpDescription =
     "Coding style, currently supports:\n"
-    "  LLVM, Google, Chromium, Mozilla, WebKit.\n"
+    "  LLVM, GNU, Google, Chromium, Microsoft, Mozilla, WebKit.\n"
     "Use -style=file to load style configuration from\n"
     ".clang-format file located in one of the parent\n"
     "directories of the source file (or current\n"
     "directory for stdin).\n"
     "Use -style=\"{key: value, ...}\" to set specific\n"
     "parameters, e.g.:\n"
     "  -style=\"{BasedOnStyle: llvm, IndentWidth: 8}\"";
 

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

parser.add_argument('-iregex', metavar='PATTERN', default=
                       r'|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, Google, Chromium, '
-                      'Mozilla, WebKit)')
+                      help='formatting style to apply (LLVM, GNU, Google, Chromium, '
+                      'Microsoft, Mozilla, WebKit)')
   parser.add_argument('-binary', default='clang-format',
                       help='location of binary to use for clang-format')
   args = parser.parse_args()
 
   # Extract changed lines for each file.
   filename = None
   lines_by_file = {}
   for line in sys.stdin: