2.x: Fix Observable.delay & Flowable.delay javadoc (#5617)

Author: PhilGlass

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

@@ -7261,7 +7261,7 @@ public final Flowable<T> delay(long delay, TimeUnit unit) {
 
     /**
      * Returns a Flowable that emits the items emitted by the source Publisher shifted forward in time by a
-     * specified delay. Error notifications from the source Publisher are not delayed.
+     * specified delay. If {@code delayError} is true, error notifications will also be delayed.
      * <p>
      * <img width="640" height="310" src="https://raw.github.com/wiki/ReactiveX/RxJava/images/rx-operators/delay.png" alt="">
      * <dl>
@@ -7318,7 +7318,7 @@ public final Flowable<T> delay(long delay, TimeUnit unit, Scheduler scheduler) {
 
     /**
      * Returns a Flowable that emits the items emitted by the source Publisher shifted forward in time by a
-     * specified delay. Error notifications from the source Publisher are not delayed.
+     * specified delay. If {@code delayError} is true, error notifications will also be delayed.
      * <p>
      * <img width="640" height="310" src="https://raw.github.com/wiki/ReactiveX/RxJava/images/rx-operators/delay.s.png" alt="">
      * <dl>

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

@@ -6546,7 +6546,7 @@ public final Observable<T> delay(long delay, TimeUnit unit) {
 
     /**
      * Returns an Observable that emits the items emitted by the source ObservableSource shifted forward in time by a
-     * specified delay. Error notifications from the source ObservableSource are not delayed.
+     * specified delay. If {@code delayError} is true, error notifications will also be delayed.
      * <p>
      * <img width="640" height="310" src="https://raw.github.com/wiki/ReactiveX/RxJava/images/rx-operators/delay.png" alt="">
      * <dl>
@@ -6597,7 +6597,7 @@ public final Observable<T> delay(long delay, TimeUnit unit, Scheduler scheduler)
 
     /**
      * Returns an Observable that emits the items emitted by the source ObservableSource shifted forward in time by a
-     * specified delay. Error notifications from the source ObservableSource are not delayed.
+     * specified delay. If {@code delayError} is true, error notifications will also be delayed.
      * <p>
      * <img width="640" height="310" src="https://raw.github.com/wiki/ReactiveX/RxJava/images/rx-operators/delay.s.png" alt="">
      * <dl>