return wherami coordinates in preset format

ArmCtlListener.py

@@ -85,7 +85,7 @@ class ArmCtlListener(ArmControlListener):
 
     # Exit a parse tree produced by ArmControlParser#WhereAmI.
     def exitWhereAmI(self, ctx: ArmControlParser.WhereAmIContext):
-        print(self.r.target)
+        print(self.r.to_preset_string(self.r.target))
 
     # Enter a parse tree produced by ArmControlParser#coords.
     def enterCoords(self, ctx: ArmControlParser.CoordsContext):

README.md

@@ -90,7 +90,7 @@ Wait for the arm to stop moving.
 If time is given, pause for that amount of time after movement has completed. If time is omitted, do the next command immediately after movement stops.
 #### pass
 Do nothing.
-#### wherami
+#### whereami
 Print out the current coordinates of the arm.
 
 ### Shell Commands

firmware/robot.py

@@ -61,6 +61,10 @@ class Robot:
         data = str.split(',')
         return [int(val) for val in data]
 
+    @staticmethod
+    def to_preset_string(list):
+        return "{" + ",".join([str(val) for val in list]) + "}"
+
     def serial_read_handler(self, data):
         data = data.strip()
         if data.startswith(b'{') and data.endswith(b'}'):