emberjs/ember.js — pull request #9446 by mixonic (2014-10-30 12:56:44+00:00)
Title: [BUGFIX release] Fix htmlSafe to accept numbers

Handlebars SafeString does not ensure unescaped strings are actually
strings. Morph expects that they are.

Convert content to a string before passing it to SafeString.

Fixes #9445