If you are tired of downloading and applying patches from trac, wp-apply-patch is for you.
$ wp-apply-patch 13023 Downloading from http://core.trac.wordpress.org/ticket/13023... Applying 13023.diff... patching file wp-admin/options-general.php
or in the case of multiple patches in the ticket:
$ wp-apply-patch 13237 ~/wordpress/trunk:creep M Downloading from http://core.trac.wordpress.org/ticket/13237... Choose a patch to apply: 0 → alot.patch by johnjamesjacoby 1 → alot.2.patch by beaulebens > 0 Applying alot.patch... (Stripping trailing CRs from patch.) patching file wp-admin/import/livejournal.php …