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This solves two minor issues of the `powrap --help` output:
- First one is that argparse shows short and then long form of --help option, while powrap's arguments show long and then short, causing it to look like:
```
options:
-h, --help show this help message and exit
--modified, -m Use git to find modified files ...
-C GIT_ROOT To use with --modified to tell ...
--quiet, -q Do not show progress bar ...
...
```
- The other thing is that the exit code is set in multi-line string, but not actually printed as multi-line string. While it looks compacted and OK in the printed help message, I assume that's not the intended so I set RawTextHelpFormatter to make sure the formatting is honored.
```
exit code: 0:nothing to do 1:would rewrap 127:error running msgcat
```
Reviewed-on: #2
Co-authored-by: rffontenelle <rffontenelle@gmail.com>
Co-committed-by: rffontenelle <rffontenelle@gmail.com>
rffontenelle
Julien Palard
Ege Akman