Update formatting script

[tweska]

I realized the example in our new formatting script does not correctly pick up the right files, then ended up tweaking a bunch of stuff:

• Check the extension for c/c++ specific formatting
• Add white space related fixes
• Update pre-commit hook to run the formatting script (but not actually make changes)
• Mention how to use pre-commit hook in the readme
• Remove // at the end of lines in the mars2grib rules
• Run the formatter

🌈🌦️📖🚧 Documentation 🚧📖🌦️🌈
https://sites.ecmwf.int/docs/dev-section/multio/pull-requests/PR-188

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 56.61%. Comparing base (4999369) to head (bd2df7b).

Additional details and impacted files

@@           Coverage Diff            @@
##           develop     #188   +/-   ##
========================================
  Coverage    56.61%   56.61%           
========================================
  Files          316      316           
  Lines        20304    20304           
  Branches      1569     1569           
========================================
  Hits         11496    11496           
  Misses        8808     8808           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[pgeier]

We have quite a few opened PR, maybe we wait with formatting for some more to be closed??

In the mars2grib/Rules.cc the trailing // have been introduced to customize formatting and make the rules more readable. Have you tried running formating it multiple times? The format on these might change on more time and become quite clumpy.

Alternative was to disable clang-format completely through comments // clang-format off. The advantage of // is that is still formats.

I would prefer not to touch the Rules.cc for now, there are more changes coming.

[tweska]

We have quite a few opened PR, maybe we wait with formatting for some more to be closed??

Yes, this is also what I suggested in the team meeting today. I will remove the commits that actually reformat code.

Alternative was to disable clang-format completely through comments // clang-format off. The advantage of // is that is still formats.

This is what I have already done in this PR, but I will remove that commit so that you can put changes on top without conflicts. Then we can always apply the changes manually again, it takes only a few minutes with find and replace.