bug#9054: 24.0.50; show source in other window

[martin rudalics]

> Every help command has own unique feedback:
>
>    C-h f xyz C-M-c => error: Symbol’s function definition is void: xyz
>    C-h v xyz C-M-c => Help buffer: xyz is void as a variable.
>    C-h o xyz C-M-c => no output
>    C-h w xyz C-M-c => message: xyz is not on any key
>    C-h x xyz C-M-c => error: Symbol is not a command: xyz
>    C-h a xyz C-M-c => message: No apropos matches for ‘xyz’

I wasn't talking about C-h ...  I meant the context menu popping up via
mouse-3 when 'context-menu-mode' is enabled.  I think whichever text a
user clicks on in an Elisp buffer should pop up something informative.
But with

(context-menu-mode)
(setq x 3)
(setp x 3)

right clicking on 'setq' and choosing "Describe symbol" from the menu
displays a help buffer for 'setq'.  Doing the same for 'setp' gets me

down-mouse-3 describe-symbol

in the echo area.

martin