title: Escape forward slash in Ruby url helper
body: <p>Setuping a staticMatic project using <code>/index.html</code>: </p>
  
  <p><code>@slug = current_page.gsub(/\.html/, '')</code></p>
  
  <p>returns <code>"/index(.html)"</code>, but should be <code>/index</code> </p>
  
  <hr>
  
  <p>Changing term corrects: - <code>@slug = current_page.gsub("/", "").gsub(".html", "")</code> as found in: </p>
  
  <p><code>https://github.com/adamstac/staticmatic-bootstrap/blob/master/src/helpers/application_helper.rb</code></p>