vim-patch:7.4.527

Problem:    Still confusing regexp failure and NFA_TOO_EXPENSIVE.
Solution:   NFA changes equivalent of 7.4.526.

https://code.google.com/p/vim/source/detail?r=v7-4-527

src/nvim/version.c

@@ -211,7 +211,7 @@ static int included_patches[] = {
   //530,
   //529,
   //528,
-  //527,
+  527,
   //526,
   //525,
   //524,