title: A simple way to remove newlines (line breaks) between CSS selectors
body: <p>With gulp-beautify I'm optimizing files containing CSS for email, which means they can't have newlines between selectors, since there is a limit on the total number of lines allowed in some email clients. I've found Beautify has an option to <em>add</em> newlines between selectors, but it doesn't have a feature to <em>remove</em> them. If selector_separator_newline is false, it ignores newlines if present.</p>
  <p>I'm building tasks for two outputs, minified, and beautified. Obviously, the minified version doesn't need this.</p>
  <p>I could minify before I beautify, but that removes comments, and I need to preserve comments.</p>
  <p>I could remove all new lines and then run Beautify, and I'm looking into doing that, but I feel like I'm missing something.</p>
  <p>Is there a package, out-of-the-box, or otherwise simple way to remove all newlines / line breaks between selectors?</p>