refinery/refinerycms — pull request #2350 by wuboy0307 (2013-07-30 19:55:56+00:00)
Title: fix The `span` element containing a `style` tag causes markup corruption

fix https://github.com/refinery/refinerycms/issues/1915
The `span` element containing a `style` tag causes markup corruptions

source from https://github.com/wymeditor/wymeditor/issues/211