Formatting cleanups: change/add tags, Unicode quotes/dashes, etc.
@dboles
Submitted by Daniel Boles Link to original bug (#792482)
Description
Patches follow. These are probably fine, but I'd like a 2nd eye on the various formatting tweaks to ensure I got everything right. Most of this is applicable to master, though they're currently based on the gtkmm-3-22 branch.
Version: 3.22.x