Use semantic elements in sidebar #580
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gadenbuie
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cpsievert
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Fixes #579
This PR improves the accessibility of the sidebar markup in three ways:
role="main'from the sidebar.mainarea. This is a WCAG violation, because there should only be one main landmark on the page.<aside>for the sidebar, rather thanrole="complimentary". These are functionally equivalent.<header>for the sidebar title.