Group HEAD optimization logic into HTML getter, add docs
Group HEAD optimization logic into HTML getter, add docs

rouge8/pip,xavfernandez/pip,pradyunsg/pip,pypa/pip,pfmoore/pip,pypa/pip,rouge8/pip,rouge8/pip,sbidoul/pip,pradyunsg/pip,xavfernandez/pip,sbidoul/pip,pfmoore/pip,xavfernandez/pip