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I don't think that syntax is Hipchat-specific

• jnordwick 9y ago
  It's originally from `ed` then `sed` then `vi`. It's been in use in email, Usenet, and IRC for a very long time.
• baq 9y ago
  Nomination for the Golden Keyboard Award in the Understatement of the Year category. <wink type=Usenet>