Fix to support longer afters

Author: wooorm

lib/util/safe.js

@@ -50,7 +50,7 @@ function safe(context, input, config) {
   positions.sort(numerical)
 
   start = config.before ? config.before.length : 0
-  end = value.length - (config.after ? 1 : 0)
+  end = value.length - (config.after ? config.after.length : 0)
   index = -1
   length = positions.length