Sorry, I should have thought more flexibly.

>>>>> Ikumi Keita <ik...@ikumi.que.jp> writes:

> So I propose to change the `concat' part like this:
>     (concat (regexp-quote TeX-esc) "\\(?:"
>             (regexp-opt cmds "\\(?:")
>             "\\b"
>             "\\|"
>             (regexp-opt symbs "\\(?:")
>             "\\)")

The second `regexp-opt' does not require the optional argument.  Just
    (concat (regexp-quote TeX-esc) "\\(?:"
            (regexp-opt cmds "\\(?:")
            "\\b"
            "\\|"
            (regexp-opt symbs)
            "\\)")
would be sufficient.

Best,
Ikumi Keita

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