Fix bug.

announcement.gemspec

@@ -53,7 +53,7 @@ if bundle_update_flag
           filename = folder+'assets/stylesheets/template/base/_variables.scss'
           texts = File.open(filename,'r:UTF-8') do |f|
                     f.read
-                  end.force_encoding('UTF-8')
+                  end.force_encoding('UTF-8').gsub(/(\r\n){2,}/, "\r\n")
           s1 = texts.scan(/{|}/)
           if s1.count % 2 != 0
             i = texts.rindex(s1[-1])