Tags: patch

With help from modified versions of the xr and relint packages,
I noticed some suspicious regexps in the new tree-sitter modes:

- Using bol/eol anchors where matching is performed against the whole
  node text
- Shy groups probably mistyped/copied as :? instead of ?:
- Identifiers defined as comprising [A-Z_\\d], where I assume \d was
  meant to match digits, but instead matches '\' or 'd'
- Unnecessary numbered grouping

These all occur in new Emacs 29 features, so the patch is intended for
emacs-29.

WDYT?

Thanks,

-- 
Basil