code: function pathStartsWith( fullPath, pathPrefix ) {
  	return (
  		fullPath === pathPrefix ||
  		( fullPath.slice( 0, pathPrefix.length ) === pathPrefix &&
  			includes( '/?', fullPath[ pathPrefix.length ] ) )
  	);
  }
docs: Check if `path` starts with `pathPrefix` and the very next character (if there is any) is `/` or `?`