Add forgotten foldMap to the imports.
Add forgotten foldMap to the imports.

The foldMap is in Prelude on base 4.8, that is why I missed it.

iu-parfunc/containers,Zigazou/containers,iu-parfunc/containers,shockkolate/containers,Zigazou/containers,shockkolate/containers,shockkolate/containers,iu-parfunc/containers,Zigazou/containers