MacOS 13 has changed its version of `man` to an version that doesn't
properly support `man -w` (without arguments). In order to workaround
this we simply fallback to $MANPATH.

Fixes #20579

Problem:    SubStation Alpha files are not recognized.
Solution:   Add patterns for SubStation Alpha files. (closes vim/vim#11332)
https://github.com/vim/vim/commit/084f2620ec7d08d6043de30436197c002fffe3ec

Fixes #20432

- Improve generated HTML by updating parser which includes fixes for
  single "'" and single "|":
  https://github.com/neovim/tree-sitter-vimdoc/pull/31
- Updated parser also fixes the conceal issue for "help" highlight
  queries https://github.com/neovim/tree-sitter-vimdoc/issues/23 by
  NOT including whitespace in nodes.
  - But this means we need to restore the getws() function which scrapes
    leading whitespace from the original input (buffer).

- increase python line-length limit from 88 => 100.
- gen_help_html: fix bug in "tag" case (tbl_count => tbl_contains)

ref #15632
fix #18215
fix #18479
fix #20527
fix #20532

Co-authored-by: Ben Weedon <ben@weedon.email>

Problem:    PoE filter files are not recognized.
Solution:   Add a pattern to detect PoE filter files. (closes vim/vim#11305)
https://github.com/vim/vim/commit/b7f52f5659c68b61ccc645ef866f8fd82361cd26