From be2d7bee9b9236fff4a378db8770c3ae793e8422 Mon Sep 17 00:00:00 2001
From: Randy Morgan <randym@reallyenglish.com>
Date: Tue, 27 Mar 2012 19:11:24 +0900
Subject: use << for row string processing as well.

---
 lib/axlsx/workbook/worksheet/row.rb | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/axlsx/workbook/worksheet/row.rb b/lib/axlsx/workbook/worksheet/row.rb
index cec2eb25..30101a28 100644
--- a/lib/axlsx/workbook/worksheet/row.rb
+++ b/lib/axlsx/workbook/worksheet/row.rb
@@ -61,9 +61,9 @@ module Axlsx
 
     def to_xml_string
       if custom_height?
-        "<row r=\"%s\" customHeight=\"1\" ht=\"%s\">%s</row>" % [index+1, height, @cells.inject("") { |memo, obj| obj.to_xml_string }]
+        '<row r="' << (index+1).to_s << '" customHeight="1" ht="' << height.to_s << '">' << @cells.map { |cell| cell.to_xml_string }.join << '</row>'
       else
-        "<row r=\"%s\">%s</row>" % [index+1, @cells.map{ |obj| obj.to_xml_string }.join]
+        '<row r="' << (index+1).to_s << '">' << (@cells.map { |cell| cell.to_xml_string }.join) << '</row>'
       end
     end
     # Serializes the row
-- 
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