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fix username sanitizing lets users set $*&$## as username which becomes blank username 
#nomads (thanks @stevelacey)
strip whitespace when checking oauth token 
#menubar
Add validation: min 4 char for display name 
#highscoredomains
Add validation to accept only letters and numbers for display name; may use @ at the beginning #highscoredomains
remove special characters from usernames 
#vansecrets
Prevent users from adding a double @ to their username 
#notepin
Make username regex more flexible because before some existing usernames were invalid 
#betalist
Username validation 
#fun
FIX: allow 2 letter names in validation 
#downpayment
trim spaces from messages 
#mumblespace
Allow leading and trailing whitespaces in the LinkedIn URL because copy-pasting a link usually contains whitespaces, we're doing `.trim` before sending the form and processing the request in Rails to sanitize (h/t @trishalim) 
#jobician
Build a pretty version of the username check 
#availablefyi