title: How to update a single commit on a Gem?
body: <p>I've installed <code>will_paginate</code> with Gem and Bundle; now I see there's an update on GitHub (<a href="https://github.com/dhh/will_paginate/commit/1814f5a3439333212a4e20cd4fa9db2f394fbf91" rel="nofollow noreferrer">this commit</a>) -- How can I update it? Manually? Reinstall it with <code>git clone</code>?</p>