@implSpec missing in a couple of places in `com.sun.source.*`

$ grep -r 'This implementation' open/src/jdk.compiler/share/classes/com/sun/source/ | grep -v '@implSpec'
open/src/jdk.compiler/share/classes/com/sun/source//util/DocTreeScanner.java: * {@inheritDoc} This implementation scans the children in left to right order.
open/src/jdk.compiler/share/classes/com/sun/source//util/SimpleDocTreeVisitor.java: * {@inheritDoc} This implementation calls {@code defaultAction}.