@DoRD reports (https://phabricator.wikimedia.org/T220767#5193300)
There is still a problem here. The patch caused the punctuation characters to be displayed again, but the characters cannot be selected in a browser. I haven't tested every browser, but on MacOS at least, this affects both Chrome and Firefox. In most cases, this isn't a problem, however for CheckUsers, it may be an issue.
When investigating complex sockpuppetry cases, I frequently copy/paste CU data into a text editor to make it easier to correctly format the results of the investigation for posting on-wiki. As it stands now, copying the data leaves out the parenthesis and pipe characters, so for this purpose, the fix didn't work. Please see the attached screenshots. [edit] The reason that the parens, etc., are needed for this purpose is because I use regex to find the username, and the first parens is what I search for.
@Xaosflux says:
List users does it as well, for example: https://en.wikipedia.org/wiki/Special:ListUsers?username=DoRD&group=checkuser&wpsubmit=&wpFormIdentifier=mw-listusers-form&limit=1