#549 Temporarily revert shell escaping changes, just for Windows

autoload/ale.vim

@@ -123,3 +123,14 @@ function! ale#Var(buffer, variable_name) abort
 
     return getbufvar(str2nr(a:buffer), l:full_name, g:[l:full_name])
 endfunction
+
+" Escape a string suitably for each platform.
+" shellescape() does not work on Windows.
+function! ale#Escape(str) abort
+    if fnamemodify(&shell, ':t') ==? 'cmd.exe'
+        " FIXME: Fix shell escaping for Windows.
+        return fnameescape(a:str)
+    else
+        return shellescape(a:str)
+    endif
+endfunction