fix issue 5037. "/s/c/" to "/s/c" (#5043)

a bug on windows.
link: #5037

Author: TianYun1379

autoload/ale/lsp.vim

@@ -531,7 +531,7 @@ function! ale#lsp#StartProgram(conn_id, executable, command) abort
     if g:ale_use_neovim_lsp_api && !l:conn.is_tsserver
         " For Windows from 'cmd /s/c "foo bar"' we need 'foo bar'
         let l:lsp_cmd = has('win32') && type(a:command) is v:t_string
-        \   ? ['cmd', '/s/c/', a:command[10:-2]]
+        \   ? ['cmd', '/s/c', a:command[10:-2]]
         \   : a:command
 
         " Always call lsp.start, which will either create or re-use a