title: Emacs: can "replace-regex" replace all \command{foo} to foo?
body: <p>I'm editing a Latex file which has many such things:</p>
  
  <pre><code>\command{a}
  \command{b}
  ...
  </code></pre>
  
  <p>My question is how in emacs I can change them to</p>
  
  <pre><code>a
  b
  ... 
  </code></pre>