Update CONTRIBUTING.md

CONTRIBUTING.md

@@ -1,16 +1,16 @@
 ## Thanks for thinking about this :)
 
-You can contribute to this library by filing issues, bugs and Pull requests.
+You can contribute to this library by filing issues, bugs, and Pull requests.
 
 ### Code contribution
 
-- Open issue/Pull request regarding proposed change.
-- If your proposed change is approved, Fork this repo and do changes.
-- Open Pull request against latest *development* branch. Add nice description in PR.
+- Open issue/Pull request regarding the proposed change.
+- If your proposed change is approved, Fork this repo and make changes.
+- Open Pull request against latest *development* branch. Add a nice description in PR.
 - And that's it!
 
-### Code contribution checklist
+### Contribution checklist
 
-- New code addition/deletion should not break existing flow of a system.
+- New code addition/deletion should not break the existing flow of a system.
 - All tests should be passed.
 - Verify `./gradlew detekt` is passing before creating a Pull request.