Subject: bug#63750: 30.0.50; tree-sitter: `treesit-language-source-alist' is not customisable

From: Mickey Petersen <[email-masked]>
Date: Sat, 27 May 2023 13:01:40 +0100

Given the simple alist structure, and that its intent is to be used
with the interactive function `treesit-install-language-grammar', it'd
make sense to turn it into a Customize option.