Running `dump_format_help.py` in `clang/docs/tools`:
```
warning: line too long:
relative to the current working directory when reading stdin.
warning: line too long:
--files=<filename> - A file containing a list of files to process, one per line.
warning: line too long:
--help-list - Display list of available options (--help-list-hidden for more)
Traceback (most recent call last):
File "/Users/Owen/remove-braces/clang/docs/tools/./dump_format_help.py", line 63, in <module>
contents = substitute(contents, "FORMAT_HELP", help_text)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/Users/Owen/remove-braces/clang/docs/tools/./dump_format_help.py", line 17, in substitute
return re.sub(pattern, "%s", text, flags=re.S) % replacement
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~
TypeError: not enough arguments for format string
```
This is an ongoing series of commits that are reformatting our
Python code.
Reformatting is done with `black`.
If you end up having problems merging this commit because you
have made changes to a python file, the best way to handle that
is to run git checkout --ours <yourfile> and then reformat it
with black.
If you run into any problems, post to discourse about it and
we will try to help.
RFC Thread below:
https://discourse.llvm.org/t/rfc-document-and-standardize-python-code-style
Reviewed By: MatzeB
Differential Revision: https://reviews.llvm.org/D150761
