Fixed type from cookie to cookies

_includes/sinatra-cookies.html

@@ -8,7 +8,7 @@ <h2>Usage</h2>
 <p>Allows you to read cookies:</p>
 
 <pre>get '/' do
-  &quot;value: #{cookie[:something]}&quot;
+  &quot;value: #{cookies[:something]}&quot;
 end</pre>
 
 <p>And of course to write cookies:</p>