Update implementation-notes.md

#49

Author: Denzell Barnett

doc/implementation-notes.md

@@ -1,9 +1,8 @@
 # Masses and Springs: Basics - implementation notes
 
-This simulation is a subset of the Masses and Springs simulation. It includes most of the features from the MAS simulations and uses a boolean flag (`basicsVersion`) to determine what should be implemented in the basics version. 
-
-MASB exludes the use of a energy graph and a toolbox on the Stretch and Bounce screens. The Stretch screen also uses a set of springs with discrete damping value applied. Options for adjusting the spring system have been limited to only gravity values on the lab screen.
+This simulation is a subset of the Masses and Springs simulation. It includes most of the features from MAS and uses a boolean flag (`basicsVersion`) to determine what should be implemented in the basics version. 
 
+MASB exludes the use of an energy graph and a toolbox on the Stretch and Bounce screens. The Stretch screen also uses a set of springs with a discrete damping value applied. Options for adjusting the spring system have been limited to only gravity values on the lab screen.
 
 For details on the implementation of Masses and Springs,
 see https://github.com/phetsims/masses-and-springs/blob/master/doc/implementation-notes.md.