Update release notes

Author: avh4

Release Notes/0.8.2.md

@@ -9,9 +9,9 @@ If you still need to work with Elm 0.18 code, you must make sure that either `el
 
 ## `exposing (..)`
 
-The feature of automatically expanding `exposing (..)` in `module` lines has been removed,
+The feature of automatically expanding `exposing (..)` in `module` lines has been removed.
 While exposing everything in a module is an anti-pattern for production code,
-it can be useful for rapid development sketches.
+it can be useful for rapid development sketches when the interfaces of your modules are not important.
 
 To replace the old expansion behavior, `elm-format` now allows `module` lines without an `exposing` clause.  Such lines will have the `exposing` automatically generated using the same logic that was previously used to expand `exposing (..)`.