That is sastra. Not that "So many years have passed and it has become old. Now let us reform it and put it into new way." No. You can put the same thing in a new way, but you cannot change the principle: Revision history
Diff selection: Mark the radio buttons of the revisions to compare and hit enter or the button at the bottom.
Legend: (cur) = difference with latest revision, (prev) = difference with preceding revision, m = minor edit.