Correct arity of format_string (lexical-lsp#131)

The function is called with only one argument. Using it like this leads to a crash of the server on save.

Author: Nicd

apps/remote_control/lib/lexical/remote_control/code_mod/format.ex

@@ -79,7 +79,7 @@ defmodule Lexical.RemoteControl.CodeMod.Format do
             result
 
           _ ->
-            formatter = &Code.format_string!/2
+            formatter = &Code.format_string!/1
             {formatter, nil}
         end
       else