-> fileInputTask

$ touch base/Bar.md

# this should succeed even though the contents didn't change
> fileInputTask

$ copy-file changes/Bar.md base/Bar.md

# the last modified should change due to the copy
> fileInputTask

> setLastModified

> fileInputTask

$ copy-file changes/Bar2.md base/Bar.md

> setLastModified

# this should fail even though we changed the file with a copy
-> fileInputTask

$ touch base/Bar.md

> fileInputTask
