title: vim: command to push text to same x coordinate as another line
body: <p>I'm not sure the right words to use to express what I want, which is why I'm probably having trouble finding it myself. I have a css-like file:</p>
  
  <pre><code>attr_of_super_long_length: value1,
  shorter_attr: value2,
  medium_length_attr: value3
  </code></pre>
  
  <p>I want to be able to put my cursor over the <em>v</em> in <em>value1</em> and copy its x coordinate, and then go to the <em>v</em> in <em>value2</em> and push it to the same indented x coordinate in 1 keystroke (<em>eg, not highlight and > &lt;</em>). Any ideas? Thanks!</p>