Last modified: 2012-10-11 00:32:29 UTC
Steps to reproduce: 1. Turn on enhanced editing toolbar 2. Click Edit on an article 3. Click 'Special Characters' > 'Symbols' 4. Try to figure out which one is the em dash and which one is the en dash. How to fix: Don't show these 2 characters in a monospace font.
Fixed in https://gerrit.wikimedia.org/r/#/c/27488 with a different solution.