Small from() operator follow-ups

Author: domfarolino

spec.bs

@@ -490,7 +490,8 @@ An <dfn>internal observer</dfn> is a [=struct=] with the following [=struct/item
        is an {{Observable}}, then return |value|.
 
     1. Issue: Spec the <i><b>From async iterable</b></i> conversion steps which take place before
-       the iterable conversion steps.
+       the iterable conversion steps. See <a
+       href=https://github.com/WICG/observable/issues/191>issue #191</a>.
 
     1. <i id=from-iterable-conversion><b>From iterable</b></i>: Let |iteratorMethod| be [=?=]
        [$GetMethod$](|value|, {{%Symbol.iterator%}}).
@@ -546,6 +547,10 @@ An <dfn>internal observer</dfn> is a [=struct=] with the following [=struct/item
                 {{Subscriber/error()}} method, given |r|.
 
     1. [=exception/Throw=] a {{TypeError}}.
+
+<wpt>
+  /dom/observable/tentative/observable-from.any.js
+</wpt>
 </div>
 
 <div algorithm>
@@ -679,7 +684,7 @@ For now, see [https://github.com/wicg/observable#operators](https://github.com/w
     1. Let |sourceObservable| be [=this=].
 
     1. Let |notifier| be the result of <a for=Observable lt="convert to an Observable">
-       converting</a> |value| to an Observable.
+       converting</a> |value| to an {{Observable}}.
 
     1. Let |observable| be a [=new=] {{Observable}} whose [=Observable/subscribe callback=] is an
        algorithm that takes a {{Subscriber}} |subscriber| and does the following: