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Andrew Gay
20,893 PointsWhat did he just do?
At 2:57 in this video he presses a short cut key without telling you, what is it?
2 Answers

Edward Humphreys
17,884 PointsHe pressed "CTRL+X" to exit "Y" to accept the changes and then "return" accepts the changes and gets you back to the prompt

Fuad Adetoro
iOS Development Techdegree Student 11,599 PointsHe was on the unix based editor nano, he just saved the file.
You can do this by hitting CTRL+X to exit I think if there is unsaved things it would ask for it to be saved before exiting.