atom/atom — pull request #3565 by kevinsawicki (2014-09-17 16:32:00+00:00)
Title: Support variation sequences

Expand support for high/low surrogate pairs by also supporting variation sequences so that they are treated as tokens with a screen delta of 1 but a buffer delta of 2.

http://www.alanwood.net/unicode/variation_selectors.html

Closes #3564