Remove "r" from instructions for extension modules

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=188038757

extensions/cast/README.md

@@ -12,10 +12,10 @@ Cast receiver app.
 The easiest way to use the extension is to add it as a gradle dependency:
 The easiest way to use the extension is to add it as a gradle dependency:
 
 
 ```gradle
 ```gradle
-implementation 'com.google.android.exoplayer:extension-cast:rX.X.X'
+implementation 'com.google.android.exoplayer:extension-cast:2.X.X'
 ```
 ```
 
 
-where `rX.X.X` is the version, which must match the version of the ExoPlayer
+where `2.X.X` is the version, which must match the version of the ExoPlayer
 library being used.
 library being used.
 
 
 Alternatively, you can clone the ExoPlayer repository and depend on the module
 Alternatively, you can clone the ExoPlayer repository and depend on the module

extensions/gvr/README.md

@@ -12,10 +12,10 @@ of surround sound and ambisonic soundfields.
 The easiest way to use the extension is to add it as a gradle dependency:
 The easiest way to use the extension is to add it as a gradle dependency:
 
 
 ```gradle
 ```gradle
-implementation 'com.google.android.exoplayer:extension-gvr:rX.X.X'
+implementation 'com.google.android.exoplayer:extension-gvr:2.X.X'
 ```
 ```
 
 
-where `rX.X.X` is the version, which must match the version of the ExoPlayer
+where `2.X.X` is the version, which must match the version of the ExoPlayer
 library being used.
 library being used.
 
 
 Alternatively, you can clone the ExoPlayer repository and depend on the module
 Alternatively, you can clone the ExoPlayer repository and depend on the module

extensions/ima/README.md

@@ -12,10 +12,10 @@ alongside content.
 The easiest way to use the extension is to add it as a gradle dependency:
 The easiest way to use the extension is to add it as a gradle dependency:
 
 
 ```gradle
 ```gradle
-implementation 'com.google.android.exoplayer:extension-ima:rX.X.X'
+implementation 'com.google.android.exoplayer:extension-ima:2.X.X'
 ```
 ```
 
 
-where `rX.X.X` is the version, which must match the version of the ExoPlayer
+where `2.X.X` is the version, which must match the version of the ExoPlayer
 library being used.
 library being used.
 
 
 Alternatively, you can clone the ExoPlayer repository and depend on the module
 Alternatively, you can clone the ExoPlayer repository and depend on the module

extensions/leanback/README.md

@@ -11,10 +11,10 @@ ExoPlayer.
 The easiest way to use the extension is to add it as a gradle dependency:
 The easiest way to use the extension is to add it as a gradle dependency:
 
 
 ```gradle
 ```gradle
-implementation 'com.google.android.exoplayer:extension-leanback:rX.X.X'
+implementation 'com.google.android.exoplayer:extension-leanback:2.X.X'
 ```
 ```
 
 
-where `rX.X.X` is the version, which must match the version of the ExoPlayer
+where `2.X.X` is the version, which must match the version of the ExoPlayer
 library being used.
 library being used.
 
 
 Alternatively, you can clone the ExoPlayer repository and depend on the module
 Alternatively, you can clone the ExoPlayer repository and depend on the module

extensions/mediasession/README.md

@@ -12,10 +12,10 @@ behaviour can be extended to support other playback and custom actions.
 The easiest way to use the extension is to add it as a gradle dependency:
 The easiest way to use the extension is to add it as a gradle dependency:
 
 
 ```gradle
 ```gradle
-implementation 'com.google.android.exoplayer:extension-mediasession:rX.X.X'
+implementation 'com.google.android.exoplayer:extension-mediasession:2.X.X'
 ```
 ```
 
 
-where `rX.X.X` is the version, which must match the version of the ExoPlayer
+where `2.X.X` is the version, which must match the version of the ExoPlayer
 library being used.
 library being used.
 
 
 Alternatively, you can clone the ExoPlayer repository and depend on the module
 Alternatively, you can clone the ExoPlayer repository and depend on the module

extensions/okhttp/README.md

@@ -19,10 +19,10 @@ licensed separately.
 The easiest way to use the extension is to add it as a gradle dependency:
 The easiest way to use the extension is to add it as a gradle dependency:
 
 
 ```gradle
 ```gradle
-implementation 'com.google.android.exoplayer:extension-okhttp:rX.X.X'
+implementation 'com.google.android.exoplayer:extension-okhttp:2.X.X'
 ```
 ```
 
 
-where `rX.X.X` is the version, which must match the version of the ExoPlayer
+where `2.X.X` is the version, which must match the version of the ExoPlayer
 library being used.
 library being used.
 
 
 Alternatively, you can clone the ExoPlayer repository and depend on the module
 Alternatively, you can clone the ExoPlayer repository and depend on the module

extensions/rtmp/README.md

@@ -20,10 +20,10 @@ Android, which is licensed separately.
 The easiest way to use the extension is to add it as a gradle dependency:
 The easiest way to use the extension is to add it as a gradle dependency:
 
 
 ```gradle
 ```gradle
-implementation 'com.google.android.exoplayer:extension-rtmp:rX.X.X'
+implementation 'com.google.android.exoplayer:extension-rtmp:2.X.X'
 ```
 ```
 
 
-where `rX.X.X` is the version, which must match the version of the ExoPlayer
+where `2.X.X` is the version, which must match the version of the ExoPlayer
 library being used.
 library being used.
 
 
 Alternatively, you can clone the ExoPlayer repository and depend on the module
 Alternatively, you can clone the ExoPlayer repository and depend on the module