Fix incorrect formatting in README.

Author: bravegnu

README.md

@@ -5,8 +5,8 @@ help kids who are familiar with Scratch to easily transition to
 Python.
 
 The project is currently under prototyping stage. Implements many
-Scratch blocks, and execute simple Scratch projects.
+Scratch blocks, and executes simple Scratch projects.
+
+    python -m scratch2py run <sb3-file>
+
 
-------
-python -m scratch2py
-------