8262875: doccheck: empty paragraphs, etc in java.base module

Reviewed-by: alanb, darcy, lancea

src/java.base/share/classes/java/lang/Integer.java

@@ -264,7 +264,7 @@ public final class Integer extends Number
      * <blockquote>
      *  {@code Integer.toHexString(n).toUpperCase()}
      * </blockquote>
-     * <p>
+     *
      * @apiNote
      * The {@link java.util.HexFormat} class provides formatting and parsing
      * of byte arrays and primitives to return a string or adding to an {@link Appendable}.

src/java.base/share/classes/java/lang/Long.java

@@ -299,7 +299,7 @@ public final class Long extends Number
      * <blockquote>
      *  {@code Long.toHexString(n).toUpperCase()}
      * </blockquote>
-     * <p>
+     *
      * @apiNote
      * The {@link java.util.HexFormat} class provides formatting and parsing
      * of byte arrays and primitives to return a string or adding to an {@link Appendable}.

src/java.base/share/classes/java/lang/invoke/MethodHandles.java

@@ -1681,7 +1681,7 @@ public class MethodHandles {
          * (used during {@link #findClass} invocations)
          * are determined by the lookup class' loader,
          * which may change due to this operation.
-         * <p>
+         *
          * @param requestedLookupClass the desired lookup class for the new lookup object
          * @return a lookup object which reports the desired lookup class, or the same object
          * if there is no change