Objective: find all *.html files in subtrees
jdk/src/macosx/classes/com/apple/eawt/
jdk/src/share/classes/javax/swing/
jdk/src/share/classes/javax/print/
jdk/src/share/classes/java/awt/ ,
run tidy -e on them and fix all errors and most warnings.

If we understand the task literally as described, there will be no changes in material of the fixed pages and unlikely -- in their visual layout. As a by-product of this work, more serious changes may be required by separate change requests.