@var{x_1} is funny in pdf

[Raymond Toy]

This came up recently on the maxima list where @var{x_1} shows up fine
in html but looks weird in the pdf file.  For example,
https://maxima.sourceforge.io/docs/manual/maxima.pdf, page 55,
documentation of the 'create_list'-command.  The line for the
create_list function looks fine, but the first sentence shows @var{x_1}
in a funny way.

(The html version at
https://common-lisp.net/project/maxima/docs/maxima_21.html#index-create_005flist
looks fine.)

Is this an issue with texinfo or how @var{} is being used?

--
Ray