tweak

Author: wanderview

docs/index.bs

@@ -216,9 +216,9 @@ spec: webappsec-referrer-policy; urlPrefix: https://w3c.github.io/webappsec-refe
 
     A <dfn export id="dfn-service-worker-registration" for="">service worker registration</dfn> is a tuple of an [=environment settings object/origin=], an [=service worker registration/id=], and a set of [=/service workers=]; an <a>installing worker</a>, a <a>waiting worker</a>, and an <a>active worker</a>. A user agent *may* enable many [=/service worker registrations=] at a single origin so long as the [=service worker registration/id=] of the [=/service worker registration=] differs.
 
-    A [=/service worker registration=] has an associated <dfn export id="dfn-origin">origin</dfn> an [=environment settings object/origin=].
+    A [=/service worker registration=] has an associated <dfn export id="dfn-origin">origin</dfn>, an [=environment settings object/origin=].
 
-    A [=/service worker registration=] has an associated <dfn export id="dfn-id">id</dfn> a [=DOMString=].  It is initially set to null.
+    A [=/service worker registration=] has an associated <dfn export id="dfn-id">id</dfn>.
 
     A [=/service worker registration=] has an associated <dfn export id="dfn-installing-worker">installing worker</dfn> (a [=/service worker=] or null) whose [=service worker/state=] is "`installing`". It is initially set to null.