runtime(vim): Update base-syntax, fix escaping :syn and :hi sub-groups (vim/vim#14137)
* runtime(vim): Update base-syntax, fix escaping :syn and :hi sub-groups
- Remove contained :syntax and :highlight sub-groups from the function
body cluster. These should only match in the respective commands.
- Remove vimSynLine syntax group from several clusters. The definition
of vimSynLine was removed in Vim 5.3.
* runtime(vim): Update syntax generator, use standard Last Change date format
The de facto standard date format is YYYY MMM DD.
e5c9ba6015
Co-authored-by: dkearns <dougkearns@gmail.com>
0ffc926499
