Previously, information about the selection before a document change operation was saved. This information was used to figure out what text was replaced by the operation. This is no longer needed because this information can be determined from the position received in the document's contents change signal and from the current cursor position, which is at the end of the change.
Therefore, the before selection no longer needs to be saved. Also, since this was the only use of the Selection class, this class was also removed.
[commit ebffb4445c]
Friday, March 8, 2013
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