fixed tabs/spaces, also set height on new window

vim/plugin/todo.vim

@@ -166,11 +166,12 @@ function! s:OpenTodoBuffer(content)
 	if exists('b:is_todo_output_buffer') && b:is_todo_output_buffer
 		enew!
 	else
-		new
+		10new
 	endif
 	setlocal buftype=nofile readonly modifiable
 	silent put=a:content
 	keepjumps 0d
 	setlocal nomodifiable
+	setlocal winfixheight
 	let b:is_todo_output_buffer = 1
 endfunction