Merge pull request #29 from weierophinney/hotfix/fig-standards-460

Sync with php-fig/fig-standards#460

src/UriInterface.php

@@ -99,7 +99,7 @@ public function getPort();
      * Retrieve the path segment of the URI.
      *
      * This method MUST return a string; if no path is present it MUST return
-     * an empty string.
+     * the string "/".
      *
      * @return string The path segment of the URI.
      */