Filter out empty patterns in branch names
Filter out empty patterns in branch names

wfxiang08/changes,dropbox/changes,dropbox/changes,dropbox/changes,bowlofstew/changes,bowlofstew/changes,wfxiang08/changes,bowlofstew/changes,wfxiang08/changes,dropbox/changes,bowlofstew/changes,wfxiang08/changes