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Possible Duplicate:
Auto-inserted “possible duplicate” comment does not trim whitespace from question title
Why not remove trailing spaces after a question title?

The auto-created comment,

possible duplicate of [Title](URL)

If Title happens to end with a space, as it happened here, the resulting comment is broken:

possible duplicate of [How to group time by hour or by 10 minutes ](http://stackoverflow.com/questions/5002661/how-to-group-time-by-hour-or-by-10-minutes)

Please remove the trailing whitespace for the purpose of auto-creating comments.

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marked as duplicate by Tim Stone, Mat, ChrisF, Nick Craver May 16 '12 at 14:44

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

See also: Why not remove trailing spaces after a question title?. The titles aren't supposed to be allowed to have spaces in the first place, which avoid this scenario, but the validation seems to be inconsistent between new posts and edits. –  Tim Stone May 16 '12 at 13:03