Documentation says two blank lines are necessary before Co-authored-by trailers, but one blank line is sufficient

[emdash-ie]

Code of Conduct

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What article on docs.github.com is affected?

https://docs.github.com/en/pull-requests/committing-changes-to-your-project/creating-and-editing-commits/creating-a-commit-with-multiple-authors

What part(s) of the article would you like to see updated?

At the moment, these docs say two blank lines are required before Co-authored-by trailers to mark a commit as having multiple authors.

However, it appears one blank line is sufficient, as can be seen in this commit, which has the two co-authors recognised in the UI.

Additional information

A requirement for two blank lines is a particularly annoying one because git defaults to removing consecutive blank lines unless prevented to with git commit --cleanup=verbatim.

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