Fix the `TimelineEvent.markup` content (fields were not escaped and summary was wikified). Closes #4149
Fix the `TimelineEvent.markup` content (fields were not escaped and summary was wikified). Closes #4149

git-svn-id: eda3d06fcef731589ace1b284159cead3416df9b@4290 af82e41b-90c4-0310-8c96-b1721e28e2e2

netjunki/trac-Pygit2,netjunki/trac-Pygit2,walty8/trac,walty8/trac,jun66j5/trac-ja,walty8/trac,netjunki/trac-Pygit2,jun66j5/trac-ja,jun66j5/trac-ja,walty8/trac,jun66j5/trac-ja