Style: Remove tabs from code base

[awvwgk]

Found some occurrences of tabs, which are banned from this code base in the style guide.

[ivan-pi]

We don't have any GitHub action running the code through a linter do we?
Hopefully the GSoC Fortran parser project moves us in this direction.

I know there is linter under active development at CERFACS: https://pypi.org/project/flinter/

[awvwgk]

There is the “PR-Review / review-dog / misspell” action, which I have seen in action only once flagging a false positive. No linting or formatter action so far. Is #3 the right place to discuss this or should we open a new issue on this?

[ivan-pi]

I would prefer to keep such technical "details" out of #3.

Your post over at fortran-lang/fpm#197 summarizes the currently available auto-formatting tools pretty well. Maybe it is easier to first decide to adopt some CI there it can be ported to stdlib later.

[milancurcic]

Yes, this is a no-brainer. Thanks!