title: Using Ctrl-A in Vim command line to increment a number
body: <p>In normal mode (in Vim) if the cursor is on a number, hitting <kbd>Ctrl</kbd>-<kbd>A</kbd> increments the number by 1. Now I want to do the same thing, but from the command line. Specifically, I want to go to certain lines whose first character is a number, and increment it, i.e., I want to run the following command:</p>
  
  <pre><code>:g/searchString/ Ctrl-A
  </code></pre>
  
  <p>I tried to store <kbd>Ctrl</kbd>-<kbd>A</kbd> in a macro (say <code>a</code>), and using <code>:g/searchString/ @a</code>, but I get an error:</p>
  
  <blockquote>
    <p>E492: Not an editor command ^A</p>
  </blockquote>
  
  <p>Any suggestions?</p>