Request for editing draft document #3

I suggest editing some example fields on draft document.

1. Since the response from the server includes Accept-Signature: sig1=("@method", "@target-uri");created;nonce, section 3.1.4 3. The Client Signs the Header, shouldn't sig1 contain those components at least?

- Current 
"@signature-params": ("@request-target" "authorization");keyid="/keys/alice#";\
   created=1617265800;expires=1617320700

- Maybe
"@signature-params": ("@method, @target-uri, "authorization");keyid="/keys/alice#";\
   created=1617265800;expires=1617320700;nonce={..}

2. On section 4.1 The keyid URL example HTTP message, I think there is a typo. Authorization: HttpSig proof=sig2 -> Authorization: HttpSig proof=sig1