HTML validation issues

[bittner]

From https://github.com/schidlo/behave-html-formatter/issues/6:

When you run the w3validator HTML validation service over the generated HTML code a few violations are reported:

L#	Violation	Suggested solution
210	type attribute in style shall be omitted	Remove type parameter value
212	type attribute in script shall be omitted	Remove type parameter value
228	p shall not wrap other paragraphs	Use div instead
367	span tag shall not be self-closing	(Make sure there is an opening and a closing tag)

• The resulting strew closing li tag is likely a result of the self-closing span tag.
• The illegal span tag might be the reason for unsuccessful embedding, as reported on the Behave issue tracker.

Side note

It might be good practice to have a test suite that runs html5validator (container image) over a generated result.