The other extract methods are named `extract_from_<something>`, this was
te only one, which wasn't.
Also, it was returning an instance of `Translations`,
not an array of entries, which the name suggested.
git-svn-id: https://develop.svn.wordpress.org/trunk@25920 602fd350-edb4-49c9-b593-d223f7449a82
Two purposes:
* Helps people, reading the code to have a better idea of the structure of the array
* Reciprocity with `$comment_prefix`, which has a default value
See #25691
git-svn-id: https://develop.svn.wordpress.org/trunk@25918 602fd350-edb4-49c9-b593-d223f7449a82
