title: Map backslash in VIM
body: <p>I have Vim EasyMotion running by pressing:</p>
  
  <pre><code>Backslash Backslash &lt;key&gt;
  </code></pre>
  
  <p>I want to map this as <code>Ctrl+,</code> so I can do <code>Ctrl+, &lt;key&gt;</code>:</p>
  
  <pre><code>map &lt;C-,&gt; &lt;Bslash&gt;&lt;Bslash&gt;
  map &lt;C-,&gt; \\
  </code></pre>
  
  <p>But none of them worked. Has the backslash be escaped somehow?</p>