bug#58532: 29.0.50; Support displaying imenu entries in a separate buffer

[Juri Linkov]

>>> Unfortunately, mupdf/mutool doesn't support Unicode characters:
>>> https://bugs.ghostscript.com/show_bug.cgi?id=702358
>>> Maybe doc-view--pdf-outline could post-process the output
>>> to replace hex-encoded numbers with their character equivalents?
>>
>> i wasn't aware of this mutool limitation when i wrote that function; if
>> the encoding is good enough, yes, we could do that: i'll send a patch,
>> unless someone already did.  hmmm, do somebody have a good example of a
>> PDF with lots of unicode in its section titles?
>
> That bug is marked as fixed since 2020-05-07.  And indeed, using
> mupdf-1.19.0, when I execute the recipe given in the bug report
> non-ASCII UTF-8 encoded characters are correctly displayed.

Good news!  I'm still using mupdf-1.16, but since it's fixed in mupdf-1.19
then maybe a special handling in doc-view is not needed.