JDK-8241014: Misc. typos in doc comments

Author: stefan-zobel

src/main/java/java9/util/Maps.java

@@ -79,8 +79,7 @@ public final class Maps {
      * {@code null}, else returns the current value.
      *
      * <p><b>Implementation Requirements:</b><br>
-     * The default implementation is equivalent to, for the {@code
-     * map}:
+     * The default implementation is equivalent to, for the {@code map}:
      *
      * <pre> {@code
      * V v = map.get(key);

src/main/java/java9/util/stream/Stream.java

@@ -940,7 +940,7 @@ <R> R collect(Supplier<R> supplier,
      * additional synchronization is needed for a parallel reduction.
      *
      * <p><b>API Note:</b><br>
-     * The following will accumulate strings into an ArrayList:
+     * The following will accumulate strings into a List:
      * <pre>{@code
      *     List<String> asList = stringStream.collect(Collectors.toList());
      * }</pre>

src/main/java/java9/util/stream/package-info.java

@@ -316,7 +316,7 @@
  * see the API note documented on the {@link java9.util.stream.Stream#count count}
  * operation.)
  *
- * <p>Many computations where one might be tempted to use side effects can be more
+ * <p>Many computations where one might be tempted to use side-effects can be more
  * safely and efficiently expressed without side-effects, such as using
  * <a href="package-summary.html#Reduction">reduction</a> instead of mutable
  * accumulators. However, side-effects such as using {@code println()} for debugging
@@ -445,7 +445,7 @@
  * required.
  *
  * <p>The "widgets" examples shown earlier shows how reduction combines with
- * other operations to replace for loops with bulk operations.  If {@code widgets}
+ * other operations to replace for-loops with bulk operations.  If {@code widgets}
  * is a collection of {@code Widget} objects, which have a {@code getWeight} method,
  * we can find the heaviest widget with:
  * <pre>{@code