tessel/runtime — pull request #196 by kevinmehall (2014-06-30 21:06:24+00:00)
Title: Fix Object.prototype.toString when .call()ed on a string.

Underscore _.isString uses this, and Parse uses Underscore.

https://forums.tessel.io/t/parsejs-support-script-dies-on-require-parse/317/6