Fix trailing spaces.

Author: akarnokd

src/main/java/io/reactivex/rxjava3/internal/fuseable/FuseToFlowable.java

@@ -21,7 +21,7 @@
  * the operator goes from Flowable to some other reactive type and then the sequence calls
  * for toFlowable again:
  * <pre>
- * {@code 
+ * {@code
  * Single<Integer> single = Flowable.range(1, 10).reduce((a, b) -> a + b);
  * Flowable<Integer> flowable = single.toFlowable();
  * }

src/main/java/io/reactivex/rxjava3/internal/fuseable/FuseToMaybe.java

@@ -21,7 +21,7 @@
  * the operator goes from Maybe to some other reactive type and then the sequence calls
  * for toMaybe again:
  * <pre>
- * {@code 
+ * {@code
  * Single<Integer> single = Maybe.just(1).isEmpty();
  * Maybe<Integer> maybe = single.toMaybe();
  * }

src/main/java/io/reactivex/rxjava3/internal/schedulers/SchedulerWhen.java

@@ -53,7 +53,7 @@
  * thread pool:
  *
  * <pre>
- * {@code 
+ * {@code
  * Scheduler limitScheduler = Schedulers.computation().when(workers -> {
  *  // use merge max concurrent to limit the number of concurrent
  *  // callbacks two at a time
@@ -73,7 +73,7 @@
  * to the second.
  *
  * <pre>
- * {@code 
+ * {@code
  * Scheduler limitScheduler = Schedulers.computation().when(workers -> {
  *  // use merge max concurrent to limit the number of concurrent
  *  // Observables two at a time
@@ -88,7 +88,7 @@
  * algorithm).
  *
  * <pre>
- * {@code 
+ * {@code
  * Scheduler slowScheduler = Schedulers.computation().when(workers -> {
  *  // use concatenate to make each worker happen one at a time.
  *  return Completable.concat(workers.map(actions -> {

src/test/java/io/reactivex/rxjava3/observers/SerializedObserverTest.java

@@ -1042,7 +1042,8 @@ public void run() {
                 }
             };
 
-            TestHelper.race(r1, r2);       
+            TestHelper.race(r1, r2);
+
             to.awaitDone(5, TimeUnit.SECONDS)
             .assertError(ex)
             .assertNotComplete();