The problem was in the order of the content preparing. Now when the
filters are always skipped (they have to) we must always run
format_text() first. That will prepare nice HTML in which we just
rewrite the portfolio URIs.
Note that we are still calling clean_text() so that we do not export
malicious code for portfolios like File download. In the future, this
may be changed, made format specific or even per-export configurable.
As a side product of the patch, I have re-enabled online assignment
portfolio export and switched $options->para to false consistently.
Filters can replace text with images (smilies, temporary TeX images
etc.), links to glossaries or databases or embedded media players.
Therefore it is important to disable filter processing during portfolio
export.
During the portfolio export, portfolio_rewrite_pluginfile_urls() must be
called before format_text(). Otherwise some filters can interfere with
internal raw record syntax. For example, the Algebra Notation uses @@
for its own purposes and it used to break @@PLUGINFILE@@ placeholder.
this involves moving all formslib includes to where they're actually needed.
it also moves the portfolio stuff from assignment,data,chat,forum and glossary
into a locallib.php which involved creating it for many of those modules.
