bug#54943: 13.1.2; \iff messes up indentation in math mode

[Ruiyang Wu]

Hi there,

As the title suggests, \iff used in math mode will increase indentation
level while it is not supposed to behave like this. I have briefly
skimmed through the code and it seems to be related to the new function
LaTeX-indent-commands-regexp-make introduced in 0ce906c. The relevant
code is:

(funcall func
              LaTeX-indent-begin-list
              "if[a-zA-Z@]*\\b"
              'LaTeX-indent-begin-regexp-local)

Best,
Ruiyang

Emacs  : GNU Emacs 28.1 (build 1, aarch64-apple-darwin21.4.0, Carbon Version 
165 AppKit 2113.4)
 of 2022-04-09
Package: 13.1.2

current state:
==============
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