Can a character move into a space occupied by their ally, make an attack and then move away?

@JeremyECrawford Can a character move into a space occupied by their ally, make an attack from that space, and then move away?

— Bobby the Barbarian (@BobbyBarbarian) April 29, 2016

You can't willingly stop moving in another creature's space. #DnD https://t.co/JojMKXpXbT

— Jeremy Crawford (@JeremyECrawford) May 3, 2016

@JeremyECrawford @BobbyBarbarian Is it 'can't stop moving' or 'can't end your turn in a square'?

— Mavalanche (@aus_maverick) May 3, 2016

@aus_maverick @BobbyBarbarian Move, not turn. See the Player's Handbook, p. 191.

— Jeremy Crawford (@JeremyECrawford) May 3, 2016