`M-.' can't skip to the corresponding DEFUN from within the Apropos buffer.

[Hongyi Zhao]

Say, I've the following content snippet in the Apropos buffer:

!cons
  Macro: Destructive: Set CDR to the cons of CAR and CDR.
  Properties: edebug-form-spec

If I put the cursor on cons, NOT !cons, and then hit `M-.', Emacs
can't skip to the DEFUN of cons. But if I do the same operations in
scratch buffer, it will do the trick.

Any hints for this behavior shown by Emacs? And how to obtain the same
effect in other buffers as shown in scratch buffer?

Regards
-- 
Assoc. Prof. Hongyi Zhao <hongyi.zhao@gmail.com>
Theory and Simulation of Materials
Hebei Vocational University of Technology and Engineering
NO. 552 North Gangtie Road, Xingtai, China