Exclude last argument of command from being considered as text

[jasonmccsmith]

Using listing package, and the \lstdefinelanguage command. The use is in new.tex, but not in old.tex, so latexdiff is attempting to mark it as added, resulting in:

\lstdefinelanguage{json}
{
    \DIFadd{morestring=}[\DIFadd{b}]\DIFadd{",
    morestring=}[\DIFadd{d}]\DIFadd{'
}}

This breaks the command badly. The last argument of \lstdefinelanguage should NOT be treated as text, and instead left alone, resulting in:

\lstdefinelanguage{json}
{
    morestring=[b]",
    morestring=[d]'
}

I assumed that adding the option --exclude-textcmd=lstdefinelanguage would do this, but it does not.

Bug, or user error?

[jasonmccsmith]

WORKAROUND:

Remove whitespace from last argument block, --exclude-textcmd not needed.

\lstdefinelanguage{json}{morestring=[b]",morestring=[d]'}

Closing as probably user error.

[ftilmann]

You can also use --allow-spaces instead of removing the space but it might cause some unwanted side-effects