title: How to find a bug in ".emacs" or "init.el"?
body: <p>Sometimes when I open Emacs, Emacs initialization fail.<br>
  That is because <code>.emacs</code> or <code>init.el</code> files have a bug. (My bugs often come from just mistyping.)</p>
  
  <p>I want to find the bug in <code>.emacs</code> or <code>init.el</code>. Is there any way to do this?</p>