diff --git a/library/vendor/php-diff/SOURCE b/library/vendor/php-diff/SOURCE
index c083b23c..91614885 100644
--- a/library/vendor/php-diff/SOURCE
+++ b/library/vendor/php-diff/SOURCE
@@ -1,9 +1,19 @@
+#!/bin/bash
+
+set -ex
+
+# version based on current master 3cb3f7ce6bb8b910f5a41ea1887b1faceba6a7d7
+# plus https://github.com/chrisboulton/php-diff/pull/50
 git clone https://github.com/chrisboulton/php-diff.git
-# Last used commit:
+
 cd php-diff
-git checkout f4db229d7ae8dffa0a4f90e1adbec9bf22c93d99
+
+git fetch origin pull/50/head:pr
+git checkout a9f124f81a9436138879e56157c6cced52a6d95b
+git show -s
+
 rm -rf .git
 rm -rf .gitignore
 rm -rf composer.json
-rm -rf example
+rm -rf example tests phpunit.xml
 cd ..
diff --git a/library/vendor/php-diff/lib/Diff/Renderer/Html/Array.php b/library/vendor/php-diff/lib/Diff/Renderer/Html/Array.php
index 76a314d6..521601c6 100644
--- a/library/vendor/php-diff/lib/Diff/Renderer/Html/Array.php
+++ b/library/vendor/php-diff/lib/Diff/Renderer/Html/Array.php
@@ -176,27 +176,21 @@ class Diff_Renderer_Html_Array extends Diff_Renderer_Abstract
 	{
 		$lines = array_map(array($this, 'ExpandTabs'), $lines);
 		$lines = array_map(array($this, 'HtmlSafe'), $lines);
-		$callback = array($this, 'fixMatchedSpaces');
 		foreach($lines as &$line) {
-			// $line = preg_replace('# ( +)|^ #e', "\$this->fixSpaces('\\1')", $line);
-			$line = preg_replace_callback('# ( +)|^ #', $callback, $line);
+			$line = preg_replace_callback('# ( +)|^ #', array($this, 'fixSpaces'), $line);
 		}
 		return $lines;
 	}
 
-	protected function fixMatchedSpaces($m)
-	{
-		return $this->fixSpaces($m[1]);
-	}
-
 	/**
 	 * Replace a string containing spaces with a HTML representation using  .
 	 *
-	 * @param string $spaces The string of spaces.
+	 * @param string[] $matches Array with preg matches.
 	 * @return string The HTML representation of the string.
 	 */
-	function fixSpaces($spaces='')
+	private function fixSpaces(array $matches)
 	{
+		$spaces = $matches[1];
 		$count = strlen($spaces);
 		if($count == 0) {
 			return '';
diff --git a/library/vendor/php-diff/lib/Diff/Renderer/Html/Inline.php b/library/vendor/php-diff/lib/Diff/Renderer/Html/Inline.php
index 60e8005a..a37fec66 100644
--- a/library/vendor/php-diff/lib/Diff/Renderer/Html/Inline.php
+++ b/library/vendor/php-diff/lib/Diff/Renderer/Html/Inline.php
@@ -128,8 +128,8 @@ class Diff_Renderer_Html_Inline extends Diff_Renderer_Html_Array
 					foreach($change['changed']['lines'] as $no => $line) {
 						$toLine = $change['changed']['offset'] + $no + 1;
 						$html .= '<tr>';
-						$html .= '<th>'.$toLine.'</th>';
 						$html .= '<th>&nbsp;</th>';
+						$html .= '<th>'.$toLine.'</th>';
 						$html .= '<td class="Right"><span>'.$line.'</span></td>';
 						$html .= '</tr>';
 					}
@@ -140,4 +140,4 @@ class Diff_Renderer_Html_Inline extends Diff_Renderer_Html_Array
 		$html .= '</table>';
 		return $html;
 	}
-}
\ No newline at end of file
+}
diff --git a/library/vendor/php-diff/lib/Diff/SequenceMatcher.php b/library/vendor/php-diff/lib/Diff/SequenceMatcher.php
index e819e810..a289e391 100644
--- a/library/vendor/php-diff/lib/Diff/SequenceMatcher.php
+++ b/library/vendor/php-diff/lib/Diff/SequenceMatcher.php
@@ -50,12 +50,12 @@ class Diff_SequenceMatcher
 	/**
 	 * @var array The first sequence to compare against.
 	 */
-	private $a = null;
+	private $a = array();
 
 	/**
 	 * @var array The second sequence.
 	 */
-	private $b = null;
+	private $b = array();
 
 	/**
 	 * @var array Array of characters that are considered junk from the second sequence. Characters are the array key.
@@ -86,8 +86,8 @@ class Diff_SequenceMatcher
 	 */
 	public function __construct($a, $b, $junkCallback=null, $options)
 	{
-		$this->a = null;
-		$this->b = null;
+		$this->a = array();
+		$this->b = array();
 		$this->junkCallback = $junkCallback;
 		$this->setOptions($options);
 		$this->setSequences($a, $b);
@@ -739,4 +739,4 @@ class Diff_SequenceMatcher
 			return 1;
 		}
 	}
-}
\ No newline at end of file
+}