1 files changed, 8 insertions, 6 deletions
diff --git a/includes/pear/Text/Diff/Renderer/unified.php b/includes/pear/Text/Diff/Renderer/unified.php
index f990f72..bda6d9b 100644..100755
--- a/includes/pear/Text/Diff/Renderer/unified.php
+++ b/includes/pear/Text/Diff/Renderer/unified.php
@@ -16,7 +16,9 @@
  */
 
 /** Text_Diff_Renderer */
-require_once 'Text/Diff/Renderer.php';
+if (!class_exists("Text_Diff_Renderer")) {
+    require_once "Text/Diff/Renderer.php";
+}
 
 /**
  * @package Text_Diff
@@ -36,27 +38,27 @@ class Text_Diff_Renderer_unified extends Text_Diff_Renderer {
     function _blockHeader($xbeg, $xlen, $ybeg, $ylen)
     {
         if ($xlen != 1) {
-            $xbeg .= ',' . $xlen;
+            $xbeg .= "," . $xlen;
         }
         if ($ylen != 1) {
-            $ybeg .= ',' . $ylen;
+            $ybeg .= "," . $ylen;
         }
         return "@@ -$xbeg +$ybeg @@";
     }
 
     function _context($lines)
     {
-        return $this->_lines($lines, ' ');
+        return $this->_lines($lines, " ");
     }
 
     function _added($lines)
     {
-        return $this->_lines($lines, '+');
+        return $this->_lines($lines, "+");
     }
 
     function _deleted($lines)
     {
-        return $this->_lines($lines, '-');
+        return $this->_lines($lines, "-");
     }
 
     function _changed($orig, $final)