lib/axlsx/stylesheet/border_pr.rb in axlsx-2.0.1 vs lib/axlsx/stylesheet/border_pr.rb in axlsx-2.1.0.pre

@@ -60,12 +60,12 @@
 
     # Serializes the object
     # @param [String] str
     # @return [String]
     def to_xml_string(str = '')
-      str << '<' << @name.to_s << ' style="' << @style.to_s << '">'
+      str << ('<' << @name.to_s << ' style="' << @style.to_s << '">')
       @color.to_xml_string(str) if @color.is_a?(Color)
-      str << '</' << @name.to_s << '>'
+      str << ('</' << @name.to_s << '>')
     end
 
   end
 end