Dict.Behaviour doc cleanup
Merge pull request #1988 from jwarwick/behaviour_doc

Dict.Behaviour doc cleanup
fix error with float midpoint rounding

- remove midpoint rounding option from Float.round/2
- always midpoint round away from 0
Merge pull request #1989 from chaslemley/fix_float_round_error

fix issue with Float.round/3 (midpoint_rounding)
Fix Module.definitions_in documentation typo.
Merge pull request #1993 from chrismccord/fix_module_definitions_in_typo

Fix Module.definitions_in documentation typo.
Allow EEx.AssignsEngine to accept any Dict.t
Merge pull request #1994 from devinus/eex-assigns-dict

Allow EEx.AssignsEngine to accept any Dict.t