Fix inconsistent use of template tag highlighting

[pyrmont]

Name of the lexer
Handlebars, JSP, Smarty (possibly others).

Online example
N/A

Code sample
N/A

Additional context
The above-mentioned lexers are template lexers that do not use Comment::Preproc as the token for their template tags. This was identified by @miparnisari in this comment.

[miparnisari]

Note that Comment::Preproc prints text in italics which might be undesirable. E.g. if you try to highlight <&| it will look like <&/

[pyrmont]

As noted in the discussion in the PR, the token doesn't impact the way the text appears, that's the stylesheet. Any token will have the problem you're describing if the CSS rule for that token causes it to display with italics.

[stale]

This issue has been automatically marked as stale because it has not had any activity for more than a year. It will be closed if no additional activity occurs within the next 14 days.
If you would like this issue to remain open, please reply and let us know if the issue is still reproducible.