The magic comment links are extremely useful. However, the one page I most often find myself linking to in comments is
[help/formatting] doesn't work.
Could we have
[help/formatting] expand to https://meta.stackexchange.com/help/formatting (where
http://meta.stackexchange.com is replaced by the current site's URL) just like
[help/dont-ask] do? Ideally, the text shown would be
formatting tools but the standard
Help Center would do if that's too complex.
That way, I could just write
Please use the [help/formatting] to enter code correctly.
And have it rendered as
Please use the formatting tools to enter code correctly.