Add test for issue with attributes
Additional test
Fix bug with spaces in dynamic argument

Fail scenario:
> echo '<span class="<%= "active" if condition %>"></span>' | html2haml -e
gets:
> %span{:class => "active" if condition}
Version bump to 2.0.0.beta.2
Merge pull request #34 from ffloyd/spaces_fix

Bug: spaces in dynamic attribute