replace logging of unified diff when implicit inputs file has changed with a custom implementation that is likely to be a lot faster and doesn't suffer from the problem of only displaying - items not + items when there are lots of changes (and also is unaffected by order)
replace logging of unified diff when implicit inputs file has changed with a custom implementation that is likely to be a lot faster and doesn't suffer from the problem of only displaying - items not + items when there are lots of changes (and also is unaffected by order)

xpybuild/xpybuild,xpybuild/xpybuild,xpybuild/xpybuild,xpybuild/xpybuild