Remove trailing whitespace

As per the "Whitespace" section of the Meteor style guide, remove trailing whitespace.
https://github.com/meteor/meteor/wiki/Meteor-Style-Guide
Fix spelling error in find_upwards() comments
Merge branch 'remove-trailing-whitespace' of git://github.com/blackcoat/meteor into blackcoat-789.

Closes #789.
Merge branch 'blackcoat-789' into devel. Fixes #789.