Bug: HTML in past contributions is shown as plain text

[ruv]

Some past contributions contain HTML tables and emphases, e.g. Proposal 206: PLACE +PLACE request for discussion (the Experience section).

Now the corresponding markup is shown as plain text:

The commits potentially related to the issue are:

• 22ccbca9 — marked replaced by saneMarked (using dompurify)
• abd577fc — allowed inline-html linebreaks, took care of valid HTML sequences
• f01c14a8 — saneMarked: ins and del tags allowed, < and > properly escaped
• aaa27518 — saneMarked: u and i tags allowed