Fix MaySet detection for Lua following Neovim update (#195)

With version v0.10.0 of Neovim, the `:verbose` output added
"(run Nvim with -V1 for more details)" to the previous message,
which was simply "Last set from Lua".

plugin/sensible.vim

@@ -26,7 +26,7 @@ function! s:MaySet(option) abort
     silent verbose execute 'setglobal all' a:option . '?'
     redir END
   endif
-  return out !~# " \\(\\~[\\/][^\n]*\\|Lua\\)$"
+  return out !~# " \\(\\~[\\/]\\|Lua\\)[^\n]*$"
 endfunction
 
 if s:MaySet('backspace')