Updated mediawiki/extensions
Project: mediawiki/extensions/BlueSpiceExtensions  f7dca1f409b97067e5afc3e9c4baa37490a34c1b

Harden handling of BR tags

BR tags would produce artefacts with "data-attribute" attributes. This is
partly due to the fact, that br sometimes comes without trailing <SPACE>/.
The change makes the regex flexible enough to handle that case. Also, it
cleans up dirty code with nested data-attributes.

Change-Id: I035bcc7332c981450648b1ba258255ecc31b8478