When the original document had text containing //, this was previously
included, unchanged, in the dokuwiki output, and this interacted badly
with later, intended, formating text.
Done because I noticed that in the Autolinks section of writer.dokuwiki, the URL in inlined code was getting auto-linked, when it wasn't supposed to.
This also meant that any inline code examples that had text that looked like dokuwiki syntax could break the formatting of later text.
I've found some incorrect behaviours with the dokuwiki output, for which
extra test cases will be needed - that aren't covered by the standard
pandoc test input files.
