Src Link in Rustdoc fails for assert_eq!

[estsauver]

Step 1: Visit http://doc.rust-lang.org/std/macro.assert_eq!.html
Step 2: Click Link [src]

Page should link to http://doc.rust-lang.org/src/core/macros.rs.html#80-93, but instead links to http://doc.rust-lang.org/src/std/%3Ccore%20macros%3E.html#1-9

Suggested label A-Docs A-Rustdoc

[steveklabnik]

Not sure this isn't a dup...

[tomjakubowski]

rustdoc has some special logic to redirect through re-exports for items, but similar logic wasn't added for "re-exported" macros after macro reform.

[Meyermagic]

Just as a note, at time of writing this problem still exists in the beta docs. Might want to cherry pick the change to beta.

[steveklabnik]

@alexcrichton what do you think, should we backport this?

[alexcrichton]

I'd be fine doing so, although I thought that the main PR fixing rustdoc made it into a master -> beta merge... Ah well, either way is fine by me!