CR: clarify comment, proper linewrap

// FREEBIE

Signal/src/call/CallAudioService.swift

@@ -417,10 +417,12 @@ struct AudioSource: Hashable {
         let session = AVAudioSession.sharedInstance()
 
         guard let availableInputs = session.availableInputs else {
-            // I'm not sure when this would happen.
+            // I'm not sure why this would happen, but it may indicate an error.
+            // In practice, I haven't seen it on iOS9+.
+            //
+            // I *have* seen it on iOS8, but it doesn't seem to cause any problems,
+            // so we do *not* trigger the assert on that platform.
             if #available(iOS 9.0, *) {
-                // Fails on iOS8. We *could* remove this assert, but it might
-                // still be helfpul in catching a bug in a more used platform.
                 owsFail("No available inputs or inputs not ready")
             }
             return [AudioSource.builtInSpeaker]

Signal/src/views/RemoteVideoView.m

@@ -41,6 +41,7 @@ NS_ASSUME_NONNULL_BEGIN
     label.textAlignment = NSTextAlignmentCenter;
     label.font = [UIFont ows_boldFontWithSize:ScaleFromIPhone5(20)];
     label.textColor = UIColor.whiteColor;
+    label.lineBreakMode = NSLineBreakByWordWrapping;
 
     [self addSubview:label];
     [label autoVCenterInSuperview];