Prevent unnecessary calls to memory intensive .inner_html. Closes #117

Author: sandrods

lib/odf-report/field.rb

@@ -17,9 +17,9 @@ def replace!(content, data_item = nil)
 
       txt = content.inner_html
 
-      txt.gsub!(to_placeholder, sanitize(@data_source.value))
-
-      content.inner_html = txt
+      if txt.gsub!(to_placeholder, sanitize(@data_source.value))
+        content.inner_html = txt
+      end
 
     end