It is my habit to see that money is not being squandered. If money is spent unnecessarily, I feel very badly. You are collecting with great effort, and I do not like to see it spoiled: 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.