8247896: Invalid (@throw) tags in 2 java.io classes

Reviewed-by: mchung

Author: jonathan-gibbons

src/java.base/share/classes/java/io/PipedWriter.java

@@ -112,7 +112,7 @@ public synchronized void connect(PipedReader snk) throws IOException {
      * Implements the {@code write} method of {@code Writer}.
      *
      * @param   c   the {@code char} to be written.
-     * @throw   IOException  if the pipe is
+     * @throws  IOException  if the pipe is
      *          <a href=PipedOutputStream.html#BROKEN> {@code broken}</a>,
      *          {@link #connect(java.io.PipedReader) unconnected}, closed
      *          or an I/O error occurs.

src/java.base/share/classes/java/io/SequenceInputStream.java

@@ -121,7 +121,7 @@ private void peekNextStream() {
      *           skipped over) from the current underlying input stream
      *           without blocking or {@code 0} if this input stream
      *           has been closed by invoking its {@link #close()} method
-     * @throw    IOException  if an I/O error occurs.
+     * @throws   IOException  if an I/O error occurs.
      *
      * @since    1.1
      */