openlayers/openlayers — pull request #588 by sbrunner (2012-07-12 16:38:43+00:00)
Title: use minus sign

Use the minus sign in the Zoom controller, see more documentation:
http://en.wikipedia.org/wiki/Plus_and_minus_signs

Illustration, on the left the new version, on the right the current one.
https://plus.google.com/photos/110906094708123391897/albums/5764322547487866273?authkey=CKqq0PWB5oST2gE