Print/merge document has awkward filename if activity subject uses non-english letters
For example if the activity subject is entered in russian the filename now looks like:
In french and similar it's not too bad but accents get replaced by
It's from the use of munge() in https://github.com/civicrm/civicrm-core/pull/21006. It needs something to escape malicious input or avoid invalid filenames, but munge() might not be the best choice here.
That was just merged yesterday so only affects master.