I am a big supporter of the approach to indent with tabs and align with
spaces. (Read [here][1] f.e.) Thus at some places a simple `s/ {4}/\t/g`
(replace 4 with whatever fits) is not enough and a bit more thought is
needed. Because of that there are still places where I plan to
substitute the whitespace in the future.
This patch contains exclusively whitespace changes. Check for yourself
with `git diff --ignore-all-space`.
[1]: https://dmitryfrank.com/articles/indent_with_tabs_align_with_spaces
