Complete list of void or self-closing elements
Fixed HTML escaping after call to html_tag

The old value of _haml_concat_raw was not being set correctly, hence
calls to haml_concat after a call to haml_tag would result in the output
of haml_concat being appeneded unescaped.

Resolves #718
Prepped release
Fix 1.8.7 warning: "regexp has invalid interval"
Merge pull request #733 from mikamai/stable

Fix 1.8.7 warning: "regexp has invalid interval"
Remove hard-coded Rails form opener from tests
Merge branch 'stable'

Conflicts:
	lib/haml/helpers/action_view_extensions.rb
	test/helper_test.rb
	test/test_helper.rb