Task: Examine the tweet to determine its emotional content, assigning it to 'neutral or no emotion' or one or more of the listed emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that best describe the tweeter's feelings.
Tweet: .@Bitbucket why did you change the blue color of #bitbucket into black? #emo #dark
This tweet contains emotions: 