I have managed to hack myself into it.
$ find / -mount -name "*latex*" 2>/dev/null
I have found the location of pygments.
lexers/_mapping.py contains a line
'TexLexer': ('pygments.lexers.markup', 'TeX', ('tex', 'latex'), ('*.tex', '*.aux', '*.toc'), ('text/x-tex', 'text/x-latex')),
telling me that the lexer is contained in the file
pygments/lexers/markup.py and that the class is called
I have copied the file to
lexer/latex_atletter.py in the directory of my LaTeX project and removed all unneeded classes from it so that only the
TexLexer class remains.
This class contains a line
(r'\\([a-zA-Z]+|.)', Keyword, 'command'),
I have added an
@ to the allowed letters in the regex (and a comment at the end of the line that I have edited it).
From here I have learned how to use this custom lexer in my LaTeX document:
I have added
to the preamble and replaced every occurence of
Now, commands containing an @ symbol are highlighted correctly.