404 when switching to newer docs

[sparkiegeek]

Given an old link to 2.5 docs, e.g. https://docs.maas.io/2.5/en/nodes-add#kvm-guest-nodes

it redirects me to https://old-docs.maas.io/2.5/en//nodes-add#kvm-guest-nodes note the double /, then I want to find the 2.6 docs, so I pick it from the version selector and that in turn redirects me to https://old-docs.maas.io/2.5/2.6/en/nodes-add which 404s