Re: Variable pitch mode line

[Juri Linkov]

>> I don't believe that distro packagers might want to include Info manuals
>> in the HTML format when only Emacs will display them but not the standalone
>> Info reader.
>
> I'm not sure they include Info manuals mainly for the standalone info
> viewer either.  But in any case, currently I don't think any doc viewer
> has a good story for "use HTML as replacement for Info", so it's clear
> that if we want it to happen, we need to start by making Emacs support
> it well.  And only later, *maybe*, distros and other Info viewers will
> follow suit.

Then better to start with own dog food, and first display Emacs manuals
from HTML.  There is already a make target that produces HTML files:

  make html

Currently HTML files are generated in the source dir, that is wrong:

  doc/emacs/emacs.html

The correct place would be in the Info output dir:

  info/emacs.html

so it could reuse INFOPATH to find HTML Info manuals as well.

Then after visiting the generated HTML with eww, when proportional fonts
are enabled with `eww-toggle-fonts`, the output looks nice.
But rendering a large HTML file takes too much time.  So while
a single HTML file is still preferable over multifile Info manuals,
the Info reader should limit rendering to the currently displayed
Info node only.

Using a single HTML file will also make online reading of remote HTML
manuals easier.  For example, simply point the Emacs Info reader to
https://www.gnu.org/software/emacs/manual/html_mono/emacs.html
and it could fetch the whole HTML file, then navigate its nodes.