I exported some html with defaut style and a _javascript_ src block:
```
#+BEGIN_SRC _javascript_
var x = {}
#+END_SRC
```
The exported html contains the default styles and pseudo-elements for following languages only:
```
pre.src:hover:before { display: inline;}
pre.src-sh:before { content: 'sh'; }
pre.src-bash:before { content: 'sh'; }
pre.src-emacs-lisp:before { content: 'Emacs Lisp'; }
pre.src-R:before { content: 'R'; }
pre.src-perl:before { content: 'Perl'; }
pre.src-java:before { content: 'Java'; }
pre.src-sql:before { content: 'SQL'; }
```
Why is _javascript_ not included? I know I could write the `pre.src-_javascript_:before { content: '_javascript_'; } myself. Syntax-highlighting looks fine but the upper right label on hover is missing.
Thanks!