bug#19872: 24.4; UTF8 characters of unusual width (Gnus markers)

[Stefan Monnier]

>> [12345678901234567890] Foo
>> [12345678901234567890] Foo
>> [12345678901234567890] Foo
>> [廣東話廣東話廣東話廣東話廣東話廣東話廣東] Foo
>> [12345678901234567890] Foo
>> [12345678901234567890] Foo
>> [12345678901234567890] Foo
>> [12345678901234567890] Foo
>> 
>> no amount of align-to will make these columns line up.

> That's a separate problem.  I thought you said that you were
> truncating too long strings, so I thought these cases were already
> taken care of.

The problem is that truncating based on display width is difficult and
costly if we want to handle proportional fonts.

That's why Lars said:

   Using align-to in the summary buffer wouldn't help much directly,
   because Gnus also has to limit the width of the strings.  That can be
   done with vertical-motion and stuff, but would make generating the
   buffer slow.


-- Stefan