Follows-up 043969f84e.
This caused a fatal MWException when saving/reading pages that contain a
<source> that couldn't be highlighted (e.g. no lang attribute, unknown
lang, or too large).
Specifically when wgWellFormedXml=false, in which case $out isn't
just from Pygments, but actually from our own Html::element.
Change-Id: Ib299a274d28021b2c7bba52d763dd1e17c1f09ec
* Use 'nowiki' strip marker to prevent list processing (also known as
doBlockLevels()). This resolves various issues related to using
<syntaxhighlight/> blocks in lists and lists suddenly appearing
inside <syntaxhighlight/> blocks. Fixes T17333, T25674, T104067.
* To prevent <p/>-wrapping resulting from the above, add our own
wrapper <div/> around the output.
* Since we already have our own wrapper, remove Pygments' one and
extend it with custom attributes. This resolves some regressions
from the GeSHi migration. Fixes most of T103964.
Bug: T17333
Bug: T25674
Bug: T103964
Bug: T104067
Change-Id: I3afd1224a18549c62cd4a95fd046affa6d1d3b3f
