doc/go_faq.html: fix a couple of nits

Wrong article, one stylistic point that bothers someone (but not me).

LGTM=bradfitz
R=golang-codereviews, bradfitz
CC=golang-codereviews
https://golang.org/cl/156680043

doc/go_faq.html

@@ -1115,7 +1115,7 @@ error but the situation can still be confusing, because sometimes a
 <a href="#different_method_sets">pointer
 is necessary to satisfy an interface</a>.
 The insight is that although a pointer to a concrete type can satisfy
-an interface, with one exception <em>a pointer to an interface can never satisfy a interface</em>.
+an interface, with one exception <em>a pointer to an interface can never satisfy an interface</em>.
 </p>
 
 <p>
@@ -1356,7 +1356,7 @@ to speed it up.
 </p>
 
 <p>
-Go's goroutine scheduler is not as good as it needs to be. In future, it
+Go's goroutine scheduler is not as good as it needs to be. In the future, it
 should recognize such cases and optimize its use of OS threads. For now,
 <code>GOMAXPROCS</code> should be set on a per-application basis.
 </p>