Bikeshed cleanup (#1014)

* Re-importing the spec, making use of as many bikeshed features as I know. The whole spec isn’t here yet.

* More

* Fixing formatting

* Tidy up & ordered lists

* Be gone whitespace

* All linking errors gone!

* Reindenting EVERYTHING

* Correcting links pointing at the wrong places

* Hints were breaking styling

* Some link fixes

* Minor - fix typos

* Correct a dfn closing tag location

* Rebase and merge conflicts for the missed commits

* Pretty sure these ! are typos

* Revert "Pretty sure these ! are typos"

This reverts commit 5d841b6.

* Address @mkruisselbrink's comments: use bikeshed shorthands

* Merge bikeshed cleanups to V1

Author: jakearchibald