Fix punctuation

Author: chrisn

encrypted-media-respec.html

@@ -2794,7 +2794,7 @@ <h2>
         represents a [=CDM=] instance.
       </p>
       <p>
-        A {{MediaKeys}} object may be destroyed by the user agent when it is no longer accessible
+        A {{MediaKeys}} object may be destroyed by the user agent when it is no longer accessible.
       </p>
       <p class="note">
         For example, when there are no script references and no attached media element.
@@ -7449,7 +7449,7 @@ <h4>
             To ensure accessibility information is available in usable form, for implementations
             that choose to support encrypted in-band support content: a) the [=CDM=] MUST provide
             the decrypted data to the user agent and b) the user agent MUST process it in the same
-            way as equivalent unencrypted support content. For example, to be exposed as
+            way as equivalent unencrypted support content, for example, to be exposed as
             <a data-cite="html#timed-text-tracks">timed text tracks</a> [[HTML]].
           </p>
         </section>