Both haml and sass have the retarded behavior of trying to read a VERSION file outside their lib directory. Installing haml or sass like a sane person (i.e. into a shared lib directory) and they fail on require with ENOENT. Ugh.
In Rakefile, doc:api, fix hardcoded `hanna` call to derive the hanna executable name from ruby_install_name. So for ruby1.9, we get hanna1.9; for macruby, machanna; etc. Also did away with the shell line continuation backslashes, as we're gsubbing \s+ with ' ' anyway.
Signed-off-by: Simon Rozet <firstname.lastname@example.org>