edit_comment_link filter should pass the anchor text as a variable

[kwight]

The edit_comment_link filter currently passes only the comment ID as a variable. If a developer wants to assemble their own markup for the edit comment link, they'll need to somehow parse the anchor text from the entire $link variable. Passing the anchor text as a variable will solve this.

[kwight]

28373.2.diff can take it a step further and pass in the $before and $after variables, bringing the edit_comment_link filter more in line with the comment_reply_link filter.

[SergeyBiryukov]

28373.3.diff​ does the same for edit_post_link() and also updates filter docs.

Replying to kwight:

28373.2.diff can take it a step further and pass in the $before and $after variables, bringing the edit_comment_link filter more in line with the comment_reply_link filter.

That would make it less in line with edit_post_link filter :)

[SergeyBiryukov]

In 28590:

Pass anchor text to 'edit_post_link' and 'edit_comment_link' filters.

props kwight.
fixes #28373.