Merge pull request #3 from wilsonmar/master

Update to Python3 style of print

Author: llSourcell

README.md

@@ -25,7 +25,13 @@ Python 2 and 3 both work for this. Use [pip](https://pip.pypa.io/en/stable/) to
 
 ##Usage
 
-Just run ``demo.py`` to see the results.
+Just run ``python3 demo.py`` to see the results:
+
+   ```
+Starting gradient descent at b = 0, m = 0, error = 5565.107834483211
+Running...
+After 1000 iterations b = 0.08893651993741346, m = 1.4777440851894448, error = 112.61481011613473
+   ```
 
 ##Credits