class Roda::RodaPlugins::Render::TemplateMtimeWrapper

return the maximum.
other files, check the modification times of all dependencies and
Return when the template was last modified. If the template depends on any

def template_last_modified
  if deps = @dependencies
    deps.map{|f| File.mtime(f)}.max
  else
    File.mtime(@path)
  end
end