Merge pull request #825 from AOMediaCodec/clarify-passthrough-renderi…

…ng-layout

Clarify text indicating the input layout to use for rendering

index.bs

@@ -2364,7 +2364,7 @@ This section defines the renderer to use, given a channel-based [=Audio Element=
 
 - The input layout (x.y.z) of the IA renderer is set as follows:
     - If [=num_layers=] = 1, use the [=loudspeaker_layout=] of the [=Audio Element=].
-    - Else, if there is an [=Audio Element=] with a [=loudspeaker_layout=] that matches the playback layout, use it.
+    - Else, if the [=Audio Element=] has a [=loudspeaker_layout=] that matches the playback layout, use that matching [=loudspeaker_layout=].
     - Else, use the next highest available layout from all available [=loudspeaker_layout=]s.
 - The output layout of the IA renderer is set to the playback layout (X.Y.Z).
 - The IA renderer is selected according to the following rules: