Merge pull request #2 from sharocko/there-may-be-a-bug-in-an-exercise-how-can-i-report-it

There may be a bug in an exercise how can i report it
Update there-may-be-a-bug-in-an-exercise-how-can-i-report-it.md

Slightly changed the wording of one of Dustin's sentences.
fix some grammar issues