Nerdbot karma has issues with @mentions

[JaSpr]

About 80 % of the time, nerdbot will ignore some karma requests if they include an actual user's mention.

These are the situations we've encountered:

nerdbot karma empty @username
nerdbot karma @username

Strangely, the following work perfectly:

@username++
@username--

the best way to get these to work is joining a private room where @username is not present, therefore it does not get converted to an actual mention.