title: Create inactive timestamp keyboard shortcut not working
body: <p>So, according to the Emacs manual, you can create inactive timestamps of the form <code>[1970-01-01 Thu]</code> by hitting <code>C-c !</code>.</p>
  
  <p>However, doing so will result in my minibuffer displaying <code>C-c !-</code> waiting for further input. Hitting space or return doesn't work and just results in an error saying <code>C-c !-RET</code> isn't a valid command.</p>
  
  <p>What exactly happened here? Is the command simply not defined by default? I'm fairly certain I don't have anything defined that globally overrides this, but I could be wrong.</p>