@JeremyECrawford Can a creature enter the space an ally occupies and attack an enemy, as long as he ends his turn in unoccupied space?
— OKUNI, Yosh (@Yosh0092) August 24, 2015
The intent is that you can't willingly end your move—any part of it—in another creature's space (PH, 191). https://t.co/PbS97xpQC1
— Jeremy Crawford (@JeremyECrawford) August 25, 2015