Indicate source disposal in timeout(fallback) (ReactiveX#6365)

Author: artem-zinnatullin

src/main/java/io/reactivex/Flowable.java

@@ -16442,7 +16442,7 @@ public final Flowable<T> timeout(long timeout, TimeUnit timeUnit) {
     /**
      * Returns a Flowable that mirrors the source Publisher but applies a timeout policy for each emitted
      * item. If the next item isn't emitted within the specified timeout duration starting from its predecessor,
-     * the resulting Publisher begins instead to mirror a fallback Publisher.
+     * the source Publisher is disposed and resulting Publisher begins instead to mirror a fallback Publisher.
      * <p>
      * <img width="640" height="305" src="https://raw.github.com/wiki/ReactiveX/RxJava/images/rx-operators/timeout.2.png" alt="">
      * <dl>
@@ -16476,7 +16476,8 @@ public final Flowable<T> timeout(long timeout, TimeUnit timeUnit, Publisher<? ex
     /**
      * Returns a Flowable that mirrors the source Publisher but applies a timeout policy for each emitted
      * item using a specified Scheduler. If the next item isn't emitted within the specified timeout duration
-     * starting from its predecessor, the resulting Publisher begins instead to mirror a fallback Publisher.
+     * starting from its predecessor, the source Publisher is disposed and resulting Publisher begins
+     * instead to mirror a fallback Publisher.
      * <p>
      * <img width="640" height="305" src="https://raw.github.com/wiki/ReactiveX/RxJava/images/rx-operators/timeout.2s.png" alt="">
      * <dl>

src/main/java/io/reactivex/Maybe.java

@@ -4463,7 +4463,7 @@ public final Maybe<T> timeout(long timeout, TimeUnit timeUnit) {
     /**
      * Returns a Maybe that mirrors the source Maybe but applies a timeout policy for each emitted
      * item. If the next item isn't emitted within the specified timeout duration starting from its predecessor,
-     * the resulting Maybe begins instead to mirror a fallback MaybeSource.
+     * the source MaybeSource is disposed and resulting Maybe begins instead to mirror a fallback MaybeSource.
      * <p>
      * <img width="640" height="305" src="https://raw.github.com/wiki/ReactiveX/RxJava/images/rx-operators/timeout.2.png" alt="">
      * <dl>
@@ -4491,7 +4491,8 @@ public final Maybe<T> timeout(long timeout, TimeUnit timeUnit, MaybeSource<? ext
     /**
      * Returns a Maybe that mirrors the source Maybe but applies a timeout policy for each emitted
      * item using a specified Scheduler. If the next item isn't emitted within the specified timeout duration
-     * starting from its predecessor, the resulting Maybe begins instead to mirror a fallback MaybeSource.
+     * starting from its predecessor, the source MaybeSource is disposed and resulting Maybe begins instead
+     * to mirror a fallback MaybeSource.
      * <p>
      * <img width="640" height="305" src="https://raw.github.com/wiki/ReactiveX/RxJava/images/rx-operators/timeout.2s.png" alt="">
      * <dl>

src/main/java/io/reactivex/Observable.java

@@ -13617,7 +13617,8 @@ public final Observable<T> timeout(long timeout, TimeUnit timeUnit) {
     /**
      * Returns an Observable that mirrors the source ObservableSource but applies a timeout policy for each emitted
      * item. If the next item isn't emitted within the specified timeout duration starting from its predecessor,
-     * the resulting ObservableSource begins instead to mirror a fallback ObservableSource.
+     * the source ObservableSource is disposed and resulting ObservableSource begins instead
+     * to mirror a fallback ObservableSource.
      * <p>
      * <img width="640" height="305" src="https://raw.github.com/wiki/ReactiveX/RxJava/images/rx-operators/timeout.2.png" alt="">
      * <dl>
@@ -13644,7 +13645,8 @@ public final Observable<T> timeout(long timeout, TimeUnit timeUnit, ObservableSo
     /**
      * Returns an Observable that mirrors the source ObservableSource but applies a timeout policy for each emitted
      * item using a specified Scheduler. If the next item isn't emitted within the specified timeout duration
-     * starting from its predecessor, the resulting ObservableSource begins instead to mirror a fallback ObservableSource.
+     * starting from its predecessor, the source ObservableSource is disposed and resulting ObservableSource
+     * begins instead to mirror a fallback ObservableSource.
      * <p>
      * <img width="640" height="305" src="https://raw.github.com/wiki/ReactiveX/RxJava/images/rx-operators/timeout.2s.png" alt="">
      * <dl>