Fix the ignoring of option context

Author: jensklose

.gitignore

@@ -0,0 +1 @@
+/nbproject/

lib/Diff.php

@@ -170,7 +170,7 @@ public function getGroupedOpcodes()
 
 		require_once dirname(__FILE__).'/Diff/SequenceMatcher.php';
 		$sequenceMatcher = new Diff_SequenceMatcher($this->a, $this->b, null, $this->options);
-		$this->groupedCodes = $sequenceMatcher->getGroupedOpcodes();
+		$this->groupedCodes = $sequenceMatcher->getGroupedOpcodes($this->options['context']);
 		return $this->groupedCodes;
 	}
 }