Only pass indent through to standalone nested partials.
Only pass indent through to standalone nested partials.

Fixes #214
BrunoDeBarros/mustache.php,irontec/mustache,thecocce/mustache.php,ericariyanto/mustache.php,sophatvathana/mustache.php,bobthecow/mustache.php,evdevgit/mustache.php,zuluf/mustache.php,cgvarela/mustache.php