Fix grammar in verification material language.

Co-authored-by: Ted Thibodeau Jr <[email protected]>
Co-authored-by: Dave Longley <[email protected]>

index.html

@@ -735,7 +735,7 @@ <h3>Credentials</h3>
 [=entity=]. [=Credentials=] might also include an identifier and metadata
 to describe properties of the [=credential=], such as the
 [=issuer=], the validity date and time period, a representative image, 
-verification material to use for [=verification=] purposes, the revocation 
+[=verification material=], the revocation 
 mechanism, and so on. The metadata might be signed by the [=issuer=]. A
 [=verifiable credential=] is a set of tamper-evident [=claims=] and
 metadata that cryptographically prove who issued it.
@@ -5787,7 +5787,7 @@ <h3>Key Management</h3>
 provides recommendations for protective measures, harm reduction, and
 revocation. Although this section focuses primarily on the security of the
 private signing key, [[NIST-SP-800-57-Part-1]] also highly recommends
-confirmation of the validity of all verification material before using it.
+confirmation of the validity of all [=verification material=] before using it.
         </p>
       </section>
 
@@ -6339,7 +6339,7 @@ <h3>Credential Subject</h3>
 `credentialSubject` is expected to identify a [=subject=] to the
 [=verifier=]. If the [=holder=] is also the [=subject=], then
 the [=verifier=] could authenticate the [=holder=] if they have
-verification material metadata related to the [=holder=]. The [=verifier=]
+[=verification=] metadata related to the [=holder=]. The [=verifier=]
 could then authenticate the [=holder=] using a signature generated by the [=holder=]
 contained in the [=verifiable presentation=]. The `id`
 [=property=] is optional. [=Verifiers=] could use other [=properties=]
@@ -6390,7 +6390,7 @@ <h4>Holder</h4>
 Often relevant metadata about the [=holder=], as identified by the value of
 the `holder` [=property=], is available to, or retrievable by, the
 [=verifier=]. For example, a [=holder=] can publish information containing
-the verification material used to secure [=verifiable presentations=]. This 
+the [=verification material=] used to secure [=verifiable presentations=]. This 
 metadata is expected to be used when checking proofs on [=verifiable presentations=]. 
 Some cryptographic identifiers contain all necessary metadata in the identifier itself. 
 In those cases, no additional metadata is required. Other identifiers use verifiable data
@@ -6483,7 +6483,7 @@ <h3>Proofs (Signatures)</h3>
 
         <ul>
           <li>
-Acceptably recent metadata regarding the verification material associated 
+Acceptably recent metadata regarding the [=verification material=] associated 
 with the signature is available. For example, the metadata might include
 [=properties=] related to validity periods, key owner, or key purpose.
           </li>

terms.html

@@ -200,7 +200,7 @@
   </dd>
   <dt><dfn data-lt="verification material">verification material</dfn></dt>
   <dd>
-    Cryptographic information could be a public key or any other cryptographic data 
+    Information that could be a cryptographic public key or any other data 
     used to verify a proof.
   </dd>
   <dt><dfn data-lt="URL|URLs">URL</dfn></dt>