Brief summary of issue

I overloaded the 'look' command and the 'at_after_move' hook on players to add some OOB information to the message, so I could catch it in my custom webclient and move it to another window. The extra info showed up as expected in my webclient, allowing me to reroute it - but it also shows up in both the default webclient and a third-party client I tried (MUSHClient).

Steps to reproduce the issue

1. Execute the code: self.msg(text=((self.at_look(self.location),), {"window":"room"}))

Error output

Output prefaced with:
((u"
And ends with:
",), {'window': 'room'})

Extra information, such as Evennia revision/repo/branch, operating system and ideas for how to solve / implement:

I pulled from the git repository after encountering the issue, and found that didn't fix it.