Do an editorial pass

[OR13]

• [ ] Wrap terms in a tag, such as DID and DID Document (https://github.com/w3c/did-imp-guide/pull/12#discussion_r686214151)

• [ ] Remove parens (https://github.com/w3c/did-imp-guide/pull/12#discussion_r686216993)

• [ ] Title case all H2's (https://github.com/w3c/did-imp-guide/pull/12#discussion_r686215692)

• [ ] Remove (may) (https://github.com/w3c/did-imp-guide/pull/12#discussion_r686217739)

• [ ] Gramar (https://github.com/w3c/did-imp-guide/pull/12#discussion_r686218516)

• [ ] Remove SHOULD (https://github.com/w3c/did-imp-guide/pull/12#discussion_r686221877)

• [ ] Adjust headings "Drawback and Benefits" (https://github.com/w3c/did-imp-guide/pull/12#pullrequestreview-726851046)

• [ ] use <a data-cite="INFRA#strings">string</a>

[msporny]

Here are the respec docs: https://respec.org/docs/

[OR13]

sugggestion to call both Drawbacks and Benefits "Benefits".

[msporny]

Examples of data-cite (which you will need to do to link to terms outside of the spec): https://github.com/w3c/did-core/blob/main/index.html#L190 and https://github.com/w3c/did-core/blob/main/index.html#L764