Fixed typo in "Write Tests with Stories" 

Start with an empty test and fill them in as  --> your  <--- write the code for the story.
Start with an empty test and fill them in as  --> you  <--- write the code for the story.
Merge pull request #53 from rsiwady29/patch-1

Fixed typo in "Write Tests with Stories"
Fixing typo in Function Declaration section
Merge pull request #55 from dganoff/patch-1

Fixing typo in Function Declaration section