Typos In Comments

Author: PhilETaylor

PropertyAccessor.php

@@ -201,7 +201,7 @@ public function setValue(&$objectOrArray, $propertyPath, $value)
                 // OR
                 // 2. its child is not passed by reference
                 //
-                // This may avoid uncessary value setting process for array elements.
+                // This may avoid unnecessary value setting process for array elements.
                 // For example:
                 // '[a][b][c]' => 'old-value'
                 // If you want to change its value to 'new-value',