i18n: Use %s placeholders in translation strings (wp-admin/setup-config.php)

[ramiy]

This patch replaces wp-config.php with %s in translation strings. This way the file name can't be mistakenly changes by the translator (this is the best practice).

I also added <code> tag around the file name.

[ramiy]

I should say that the other translation strings in the file use %s and the file names use <code> HTML tags.

[ramiy]

two more strings

[ramiy]

Note: the second patch has minor string changes.

[danieltj]

Update to strings

[danieltj]

In 42161.3.diff​

I've updated the patch because the last two changes are fine as they are already and the wording itself doesn't need to be changed - the file names just need to be used as placeholders.

[ramiy]

@danieltj other translation strings that display filenames using %s placeholders are usually use <code> tags to emphasize the file, not apostrophes. Just saying...

If we are already fixing those strings, let's apply all the accepted conventions - %s placeholders, translators comments, HTML tags etc.

[SergeyBiryukov]

In 41904:

I18N: Replace hardcoded file name in translatable strings in wp-admin/setup-config.php with a placeholder.

Props ramiy, danieltj.
Fixes #42161.