Update CONTRIBUTING.md

Author: DanielGoldfarb

CONTRIBUTING.md

@@ -13,7 +13,7 @@
 - The basic workflow is:
   1. Create a **Fork** of the mplfinance repository.  (See references below for details.)  The fork will exist under *your* github account.  
   2. **Clone** *your* Fork to your local machine (`git clone`).
-  3. Work on your cloned copy of the repository, commit the changes, and then **`git push`** them *to your GitHub fork*.
+  3. Work on your cloned copy of the repository, `git commit` the changes, and then **`git push`** them *to your GitHub fork*.
   4. When you are satisfied with the code in your fork then, on the GitHub page for your fork, *open a Pull Request (PR)* asking that the changes in your fork be pulled into the main mplfinance repository.
   5. After code review, if you are asked by a maintainer to make additional changes, you do *not* have to re-enter another Pull Request (as long as the original PR is still open).  Rather, make the changes in your local clone, and simply `git push` them to your fork again.  The changes will automatically flow into the open Pull Request.
   6. When done, the maintainer of the repository will merge the changes from your fork to the mplfinance repository.  The PR will automatically be closed.  (Your fork, however, will continue to exist, and can be used again for additional Pull Requests in the future; See GitHub documentation for how to keep your Fork up to date).