bug#62086: 29.0.60; ruby-ts-mode regressions

[Eli Zaretskii <eliz@gnu.org>]

> From: Juri Linkov <juri@linkov.net>
> Date: Thu, 09 Mar 2023 19:24:40 +0200
> 
> 'C-M-f' ('forward-sexp') commands currently are unusable in master
> because they skip too much.  So I relied on word motion commands like
> 'M-f' ('forward-word') to move in ruby-ts-mode.  But unfortunately
> some recent change broke even word motion in emacs-29, so no motion commands
> can be used in ruby-ts-mode, only motion by characters can be used with
> 'C-f' ('forward-char').  Here is a recipe for recent regression in emacs-29:
> 
> 0. emacs -Q
> 1. C-x C-f test/lisp/progmodes/ruby-mode-resources/ruby-parenless-call-arguments-indent.rb RET
> 2. M-x ruby-ts-mode RET
> 3. move point to after the first letter 'c'
> 4. type 'M-f' ('forward-word')
> 
> It skips two words in symbols.

I guess this is because of the syntax-table properties that
ruby-ts-mode puts on the buffer text?

> I don't know if the second bug is related to this, but while
> in the same file, also type 'C-M-l' ('reposition-window').
> It raises the error:
> 
>   Debugger entered--Lisp error: (wrong-type-argument number-or-marker-p nil)
>     treesit-end-of-defun()
>     end-of-defun(-1)
>     reposition-window(nil nil)
>     reposition-window(nil 89)
>     funcall-interactively(reposition-window nil 89)
>     command-execute(reposition-window)
> 
> This regression is also recent.

I seem to unable to reproduce this.  Maybe it happens only in some
particular place in the file?