It can be difficult using the codeformat.py tool when there are other files
in the repository not currently matching the standard.
For developers, running over the entire repo can throw up a large list of
changes in a local git which can lead to inclusion of unrelated changes in
commits if they're added accidentally. If the files arg is used to trim
down the list of files scanned, it runs a risk of missing some files
they've modified. In CI, it means that PR's can fail on codeformat for
issues that aren't related to that PR.
This change adds a git query in the codeformat tool by default to only work
on the list of files that have been modified in the current branch. This
can still be overridden by the files arg to run over all files still, eg.
python3 tools/codeformat.py -v '**'.
Andrew Leech