vim-patch:7.4.2075

Problem:    No autocommand event to initialize a window or tab page.
Solution:   Add WinNew and TabNew events. (partly by Felipe Morales)

c917da4b3e

src/nvim/auevents.lua

@@ -89,6 +89,7 @@ return {
     'VimLeave',               -- before exiting Vim
     'VimLeavePre',            -- before exiting Vim and writing ShaDa file
     'VimResized',             -- after Vim window was resized
+    'WinNew',                 -- when entering a new window
     'WinEnter',               -- after entering a window
     'WinLeave',               -- before leaving a window
   },