Rémi Verschelde 2805f7b36d CI: Visibly print trailing whitespace when static checks fail ...

GitHub Actions seems to be hiding colored whitespace, and after lots of
attempts I couldn't find a way to work it around.

So instead I'm using a perl expression to replace trailing spaces with
`·` and tabs with `<TAB>` in the ANSI colored diff output. This ensure
that they're visible, and they are properly colored as expected too.

(cherry picked from commit 266280ffca)

2023-04-07 17:44:39 +02:00

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