Improve ALE project style checking

* The project style linter now runs while you type.
* Now the scripts for checking the project require blank lines.
* Many style issues have been found and fixed.

autoload/ale/socket.vim

@@ -104,6 +104,7 @@ function! ale#socket#IsOpen(channel_id) abort
     endif
 
     let l:channel = s:channel_map[a:channel_id].channel
+
     return ch_status(l:channel) is# 'open'
 endfunction