Feature request: Ability to delete/clear text from the buffer

It would be really nice to be able to delete/clear text or previously miss typed command from the buffer to the previous mark just like the Command + L option in the Terminal.app

Changed title: Feature request: Ability to delete text from the buffer → Feature request: Ability to delete/clear text from the buffer

Milestone changed to %Review for next version

More information here. http://apple.stackexchange.com/questions/209635/what-functionality-do-marks-offer-in-the-el-capitan-terminal