Provide output option for single-line messages

[matze-dd]

There seems to be a Vim issue with handling of multi-byte characters, if Vim's errorformat is used to parse mult-line messages. See here for the bug description.
This causes problems with Vim plugins, e.g. the compiler vlty for vimtex, if the LaTeX text contains many multi-byte characters, as in Russian texts with cyrillic letters. See here for an example.

Even if the Vim issue is fixed, it will take some time for the fix to be incorporated into Linux distributions. We therefore should provide a single-line format for option --output, for instance

• --output sl-1: include file name, line, column, LT'serror message text
• --output sl-2: as sl-1, but append LT's replacement suggestions

This option should be used in editors/vlty.py and editors/ltyc.py.

[matze-dd]

The Vim issue has been fixed in patch 8.2.1871.

[torik42]

Being fixed in vim two years ago I close this issue.