title: URLs: Dash vs. Underscore
body: <p>Is it better convention to use hyphens or underscores in your URLs?</p>
  <p>Should it be <code>/about_us</code> or <code>/about-us</code>?</p>
  <p>From usability point of view, I personally think <strong>/about-us</strong> is much better for end-user yet Google and most other websites (and javascript frameworks) use underscore naming pattern. Is it just matter of style? Are there any compatibility issues with dashes?</p>