Fix the references to navigable

index.bs

@@ -1896,7 +1896,7 @@ browsing context.
 <div algorithm>
 To <dfn>get the parent browsing context</dfn> given |browsing context|:
 
-1. Let |navigable| be the [=navigable=] whose [=navigable/active
+1. Let |navigable| be the [=/navigable=] whose [=navigable/active
    document=] is |browsing context|'s [=browsing context/active document=].
 
 1. Let |parent navigable| be |navigable|'s [=navigable/parent=].
@@ -1912,7 +1912,7 @@ To <dfn>get the child browsing contexts</dfn> given |browsing context|:
 
 TODO: make this return a list in document order
 
-1. Let |navigable| be the [=navigable=] whose [=navigable/active
+1. Let |navigable| be the [=/navigable=] whose [=navigable/active
    document=] is |browsing context|'s [=browsing context/active document=].
 
 1. Let |child navigables| be a [=/set=] containing all navigables that are
@@ -1984,7 +1984,7 @@ To <dfn>await a navigation</dfn> given |context|, |request|, |wait condition|, a
 1. Let |navigation id| be the string representation of a
    [[!RFC4122|UUID]] based on truly random, or pseudo-random numbers.
 
-1. Let |navigable| be the [=navigable=] whose [=navigable/active
+1. Let |navigable| be the [=/navigable=] whose [=navigable/active
    document=] is |context|'s [=browsing context/active document=].
 
 1. [=Navigate=] |navigable| with resource |request|, and using