spartan: add missing closing tags Browsers apparently don't care about this, but let's fix it for humans.

templatefilters: add commonprefix The commonprefix filter takes a list of files names like files() and returns the longest directory name common to all elements. Differential Revision: https://phab.mercurial-scm.org/D3439

py3: add 3 new passing tests to whitelist We ave crossed the 500 mark! Differential Revision: https://phab.mercurial-scm.org/D3638

serve: add option print-url It can be used to open hgweb in a web browser. Example : xdg-open "`hg serve --print-url`". Differential Revision: https://phab.mercurial-scm.org/D3649

chg: fix an undefined behavior about memcpy Spot by Wez Furlong. `memcpy(x, NULL, 0)` is undefined according to [1]. [1]: https://stackoverflow.com/questions/5243012 Differential Revision: https://phab.mercurial-scm.org/D3698

Added signature for changeset 9c5ced5276d6