bug#81661: 32.0.50; Offscreen context in show-paren-mode truncates multi-character keyword paren

Hi!

On 20/08/2026 08:19, Eli Zaretskii wrote:
> It would be nice if you (or someone else) could explain how Ruby mode
> sets up this keyword highlighting in show-paren-mode.  It seems that
> it customizes show-paren-data-function in some way, but I cannot find
> where that happens and what is the code of the customized function, I
> can only see its bytecode.

The code is smie--matching-block-data, it is set up as :around advice by 
smie-setup.