Re: M-g in dired

[Richard M. Stallman]

    `shadow_lookup' iterates over two maps (dired and global) and calls
    `Flookup_key' on them.  When `Flookup_key' returns 1 for the key
    "M-gn" on the dired map, the loop in `shadow_lookup' skips it

That's the place that has to be changed.

When this call to `Flookup_key' returns a number N, `shadow_lookup'
should look up a sub-key-sequence of the first N events.  If that
returns non-nil, the longer key is shadowed, so don't mention it at all.
If that returns non-nil, the longer key is not shadowed.

That avoids duplicating lots of code and avoids changing the calling
convention of Flookup_key.