Re: display-completion-list should not strip text properties

[Vinicius Jose Latorre <viniciusjl@ig.com.br>]

Richard Stallman wrote:
>     Here's a related, simple, change that I've been sitting on for a long
>     time. By putting text properties on doc strings you can insert images
>     and other fancy stuff in the *Help* buffer. This change makes
>     describe-variable preserve text properties (describe-function already
>     does so):
>
> There is no clean and easy way to put text properties on a doc string,
> so I think this is not very useful in the present context.
>
> If someone comes up with a clean way to do that, this would be a
> useful part of the combination.  We could think then about installing
> it.
>   

One way to "insert images and other fancy stuff" in doc string, could be 
to use a wiki-like language in the doc string.

The doc string have some minimal special sequence substring like:

    \[COMMAND]
    \{MAPVAR}
    \<MAPVAR>
    \=

Maybe these special sequences could be extended to have, for example:

    \==HEADER1==
    \===HEADER2===
    \#image{SOME-REFERENCE-TO-AN-IMAGE}
    \#h1{HEADER1}
    \#h2{HEADER2}
    ...etc...

and other doc stuff.

Obviously, this should be done after the release.