Without this, rudy 0.9.8 aborts for me with: ERROR (ArgumentError): interning empty string because there it tries to create a symbol from an empty string.
…and a field type is defined that is not an Array. ADDED: Support for Symbol field type
ADDED: Automatically convert a Proc to a string of its source in to_hash
Since Hanna is not always available (and requires a specific version of RDoc gem), don't force to use it with no alternative. Instead, if not available, fallback to the standard rdoc support within rake.