Update README.md

Author: dsherret

README.md

@@ -84,10 +84,10 @@ declare type email;
 declare type startDate;
 declare type flag;
 
-var number = new Number<m>(),
+var num    = new Number<m>(),
     str    = new String<email>(),
     date   = new String<startDate>(),
-    bool   = new Boolean<flag>();
+    b      = new Boolean<flag>();
 ```
 
 ## Supported Types