Tags: patch

* lisp/progmodes/lua-ts-mode.el
(lua-ts-mode--font-lock-settings): fix font-locking for string escapes

Bug: Strings aren't fontified when they have escape sequences in them.

Recipe to reproduce:
In a `lua-ts-mode` buffer, with `treesit-font-lock-level` set to 4 to
include escapes,

    "foo\nbar"

font-locks '\n' but not "foo" or "bar".

In GNU Emacs 30.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version
3.24.33, cairo version 1.16.0) of 2023-11-05 built on noah-X580VD
Repository revision: b819b8d6e90337b4cb36b35c2c6d0112c90a8e24
Repository branch: master
Windowing system distributor 'The X.Org Foundation', version 11.0.12101004
System Description: Ubuntu 22.04.3 LTS

Configured using:
 'configure --prefix=/usr/local --with-modules --with-tree-sitter
--with-threads --with-x-toolkit=gtk3 --with-xwidgets --with-gnutls
--with-json --with-mailutils --with-jpeg --with-png --with-rsvg
--with-tiff --with-xml2 --with-xpm --with-imagemagick CC=gcc-12
CXX=gcc-12'