Fully-strict version of Data.Map.Strict

Unlike Data.Map.Strict Map which is an alias to Data.Map.Lazy Map, the instances of our {- haddock #1251 {- -} -} Map are all strict as well.

You should be able to switch from the former simply by changing your module imports, and your package dependency from containers to strict-containers. If this doesn't work, please file a bug.

The documentation in the auto-generated modules have not been updated in a particularly sophisticated way, so may sound weird or contradictory. In those cases, please re-interpret such weird wording in the context of the above.