given:
        def dirname = 'somedir$$with'
        def dirAndFile = "${dirname}/${filename}"
        project.file(dirname).mkdir()
        File fileWithDollars = project.file(dirAndFile)
        fileWithDollars << "Some Text"
        FileCollection files = project.getLayout().files(dirAndFile)

        when:
        ant.property(name: "my.property", value: "doesNotExist")
        ant.delete {