RDoc loads wrong version of HAML

[fauxparse]

In my .gemrc I have:

rdoc: --inline-source --line-numbers --format=html --template=hanna

...so that I can use hanna as my default rdoc template (especially for local gem docs).

This worked up until I installed a new version of HAML (3.0.9): Hanna ignored the request in the gemspec to load HAML 2.x, and just loaded the most recent version, leading to deprecation warnings galore.