Resolve linking errors for WD-07 publication (#703)

* fix proper subset tweak

* resolve linking error for AttestationNotPrivateError

* resolve linking error: idl ref not found for [[DiscoverFromExternalSource]](origin, options, sameOriginWithAncestors)

* remove unnecessary commits

* accept jeff suggestion

Author: Angelo Liao

Diff for: index.bs

@@ -9,7 +9,7 @@ Notes:
 <h1>Web Authentication:<br>An API for accessing Public Key Credentials<br>Level 1</h1>
 <pre class='metadata'>
 Title: Web Authentication: An API for accessing Public Key Credentials - Level
-Status: ED
+Status: WD
 Prepare for TR: true
 TR: https://www.w3.org/TR/webauthn/
 ED: https://w3c.github.io/webauthn/
@@ -920,7 +920,7 @@ When this method is invoked, the user agent MUST execute the following algorithm
 
                         Issue: @balfanz wishes to add to the "direct" case:
                             If the [=authenticator=] violates the privacy requirements of the [=attestation type=] it is using, 
-                            the client SHOULD terminate this algorithm with a "{{AttestationNotPrivateError}}".
+                            the client SHOULD terminate this algorithm with a "AttestationNotPrivateError".
                     </dl>
 
                 1.  Let |id| be <code>|attestationObject|.authData.[=attestedCredentialData=].[=credentialId=]</code>.
@@ -981,8 +981,8 @@ Since this specification requires an [=authorization gesture=] to create any [=c
 for="PublicKeyCredential" method>\[[CollectFromCredentialStore]](origin, options, sameOriginWithAncestors)</dfn></code> [=internal method=] inherits the default behavior of
 {{Credential/[[CollectFromCredentialStore]]()|Credential.[[CollectFromCredentialStore]]()}}, of returning an empty set.
 
+<h5 id="discover-from-external-source" algorithm>PublicKeyCredential's <code><dfn for="PublicKeyCredential" method>\[[DiscoverFromExternalSource]](origin, options, sameOriginWithAncestors)</dfn></code> method</h5>
 
-<h5 id="discover-from-external-source" algorithm>PublicKeyCredential's `[[DiscoverFromExternalSource]](origin, options, sameOriginWithAncestors)` method</h5>
 
 <div link-for-hint="PublicKeyCredential/[[DiscoverFromExternalSource]](origin, options, sameOriginWithAncestors)">