bug#17709: 24.3; `tool-bar-map' seems inadaquately documented

[Lars Ingebrigtsen <larsi@gnus.org>]

Samuel Bronson <naesten@gmail.com> writes:

> So, we have this:
> ,----[ C-h v tool-bar-map RET ]
> | tool-bar-map is a variable defined in `tool-bar.el'.
> [...]
> | Documentation:
> | Keymap for the tool bar.
> | Define this locally to override the global tool bar.
> [...]
> `----
>
> But we also have this:
> ,----[ C-h f tool-bar-make-keymap RET ]
> | tool-bar-make-keymap is a compiled Lisp function in `tool-bar.el'.
> | 
> | (tool-bar-make-keymap &optional IGNORE)
> | 
> | Generate an actual keymap from `tool-bar-map'.
> | Its main job is to figure out which images to use based on the display's
> | color capability and based on the available image libraries.
> `----
>
> It seems that the docs for the variable `tool-bar-map' are, at best,
> completely glossing over the fact that, while perhaps technically a
> keymap according to the defition in (info "(elisp) Format of Keymaps"),
> the value of this variable is not actually directly usable, which
> (presumably) has some special extra conditional stuff in it that the
> `tool-bar-make-keymap' function filters out.

I've now expanded the doc string here in Emacs 27 somewhat.

-- 
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   bloggy blog: http://lars.ingebrigtsen.no