Fix removing leading backslash in types

Author: othercorey

src/Twig/Extension/ReflectionExtension.php

@@ -63,9 +63,10 @@ public function getFilters()
                         '/\), /',
                         '/, \(/',
                         '/^\((.*)\)$/',
-                        '/(?:^\\\\)|(?:[^_a-zA-Z])(\\\\)/',
+                        '/(?<=[(<|&])\\\\/',
+                        '/^\\\\/'
                     ],
-                    ['${1}', '<', '>', ', ', ', ', '${1}', ''],
+                    ['${1}', '<', '>', ', ', ', ', '${1}', '', ''],
                     (string)$type
                 );
             }),