title: Keep multiple space-aligned `set(VARIABLE value)` the way they were during cmake-format
body: <p>We have a lot of CMake files that contain <code>set()</code>-sequences like</p>
  <pre><code>set(VERSION_MAJOR 1)
  set(VERSION_MINOR 2)
  set(VERSION_ABI   3)
  set(VERSION_PATCH 0-rc2)
  </code></pre>
  <p>I can't find a for <code>cmake-format</code> to keep things aligned like that; it will always condense the repeated whitespaces (here, after <code>_ABI</code>) into one.</p>
  <p>Is there a way to tell <code>cmake-format</code> to keep this alignment?</p>