mysociety/alaveteli — pull request #674 by henare (2012-10-18 23:35:43+00:00)
Title: Fix empty configuration defaults

Because of the way that rblib/config.rb works, nil for these values would
always raise an exeption (see line 209) so changing it to an empty string
seems better.

It fixes my problem where I purposely didn't define HTML_TO_PDF_COMMAND
anyway.