From User:Qwerty284651:
Whilst checking regex on the AWB regex tester I noticed the link button next to the closing X button and clicked it for more info on regex since I wasn't getting the expected output and it redirected it to me a dead link: https://learn.microsoft.com/en-us/library/az24scfc.aspx (looked up archived versions on all the archive websites I could think of but to no avail; this was a permanent dead link). I am, therefore, requesting the replacement of the aforementioned embedded link with this one: https://archive.is/UfpRD.