mathquill/mathquill — pull request #187 by laughinghan (2013-05-09 22:03:22+00:00)
Title: delete \vector

it was an ancient experimental attempt at LaTeX's
`\begin{array}...\end{array}`, is terrible, and is getting in the way of
progress towards refactors that will actually enable doing environments
like array cleanly, like #186 `refactor.key-events`