8338398: Trivially fix grammar and typos

Reviewed-by: aivanov

src/java.base/share/classes/java/util/concurrent/CompletableFuture.java

@@ -2805,7 +2805,7 @@ public class CompletableFuture<T> implements Future<T>, CompletionStage<T> {
     /**
      * Exceptionally completes this CompletableFuture with
      * a {@link TimeoutException} if not otherwise completed
-     * before the given timeout.
+     * before the given timeout elapsed.
      *
      * @param timeout how long to wait before completing exceptionally
      *        with a TimeoutException, in units of {@code unit}
@@ -2825,7 +2825,7 @@ public class CompletableFuture<T> implements Future<T>, CompletionStage<T> {
 
     /**
      * Completes this CompletableFuture with the given value if not
-     * otherwise completed before the given timeout.
+     * otherwise completed before the given timeout elapsed.
      *
      * @param value the value to use upon timeout
      * @param timeout how long to wait before completing normally

src/java.base/share/classes/java/util/concurrent/ForkJoinPool.java

@@ -670,7 +670,7 @@ public class ForkJoinPool extends AbstractExecutorService {
      * period given by field keepAlive (default 60sec), which applies
      * to the first timeout of a quiescent pool. Subsequent cases use
      * minimal delays such that, if still quiescent, all will be
-     * released soon therafter. This is checked by setting the
+     * released soon thereafter. This is checked by setting the
      * "source" field of signallee to an invalid value, that will
      * remain invalid only if it did not process any tasks.
      *
@@ -855,7 +855,7 @@ public class ForkJoinPool extends AbstractExecutorService {
      * non-workers (which comply with Future.get() specs). Internal
      * usages of ForkJoinTasks ignore interrupt status when executing
      * or awaiting completion.  Otherwise, reporting task results or
-     * exceptions is preferred to throwing InterruptedExecptions,
+     * exceptions is preferred to throwing InterruptedExceptions,
      * which are in turn preferred to timeouts. Similarly, completion
      * status is preferred to reporting cancellation.  Cancellation is
      * reported as an unchecked exception by join(), and by worker

src/java.base/share/classes/java/util/concurrent/ForkJoinTask.java

@@ -1072,7 +1072,7 @@ public abstract class ForkJoinTask<V> implements Future<V>, Serializable {
 
     /**
      * Tries to join this task, returning true if it completed
-     * (possibly exceptionally) before the given timeout and
+     * (possibly exceptionally) before the given timeout elapsed and
      * the current thread has not been interrupted.
      *
      * @param timeout the maximum time to wait
@@ -1097,7 +1097,7 @@ public abstract class ForkJoinTask<V> implements Future<V>, Serializable {
 
     /**
      * Tries to join this task, returning true if it completed
-     * (possibly exceptionally) before the given timeout.
+     * (possibly exceptionally) before the given timeout elapsed.
      *
      * @param timeout the maximum time to wait
      * @param unit the time unit of the timeout argument