r6458 causes CssProperty to add a space before the first part of a CSS expression.  This patch only adds spaces after the first part.

Patch by: jlabanca
Review by: bobv (TBR)



git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@6459 8db76d5a-ed1c-0410-87a9-c151d255dfc7