chore: tidy up index.html (#409)

Co-authored-by: noamr <noamr@users.noreply.github.com>

index.html

@@ -637,16 +637,17 @@ <h3>
           global object</a> for <a>this</a>. See [=/HTTP fetch=] for more info.
         </p>
         <p data-dfn-for="PerformanceResourceTiming">
-          The <dfn>finalResponseHeadersStart</dfn> getter steps are to <a>convert fetch
-          timestamp</a> for <a>this</a>'s <a data-for=
+          The <dfn>finalResponseHeadersStart</dfn> getter steps are to
+          <a>convert fetch timestamp</a> for <a>this</a>'s <a data-for=
           "PerformanceResourceTiming">timing info</a>'s [=fetch timing
           info/final network-response start time=] and the <a>relevant global
           object</a> for <a>this</a>. See [=/HTTP fetch=] for more info.
         </p>
         <p data-dfn-for="PerformanceResourceTiming">
           The <dfn>responseStart</dfn> getter steps are to return <a>this</a>'s
-          {{PerformanceResourceTiming/firstInterimResponseStart}} if it is not 0; Otherwise
-          <a>this</a>'s {{PerformanceResourceTiming/finalResponseHeadersStart}}.
+          {{PerformanceResourceTiming/firstInterimResponseStart}} if it is not
+          0; Otherwise <a>this</a>'s
+          {{PerformanceResourceTiming/finalResponseHeadersStart}}.
         </p>
         <p data-dfn-for="PerformanceResourceTiming">
           The <dfn>responseEnd</dfn> getter steps are to <a>convert fetch