Fix invalid links in documentation.

[simi]

• wrap ENV variables in <code>
• fix rubygems.org link
• fix zenspider.com link

fixes #6986

[deivid-rodriguez]

😍

[nobu]

Please separate the subject line in the commit log from the rest by an empty line, as the git's convention.

[simi]

Please separate the subject line in the commit log from the rest by an empty line, as the git's convention.

Is it? I have never seen that anywhere being convention. Any reference on that? I'll do next time. Sorry for troubles.

[deivid-rodriguez]

We could configure https://github.com/bkuhlmann/git-lint#github-actions if we wanted to enforce this. Particularly if it could cause some ruby-core scripts to break.

[nobu]

git treats the first paragraph (separated by an empty line) of commit logs as subjects, and concatenates all lines in the paragraph with a space.

I can't share the good pointer, but you can see the subject of the commit is one line:

$ git --no-pager log --pretty=%s -1 9eaac94a63
Fix invalid links in documentation. - wrap ENV variables in <code> - fix rubygems.org link - fix zenspider.com link

In this case, %b (body) is empty.