Add an extra line to fix rST

Author: tannewt

simpleio.py

@@ -67,6 +67,7 @@ def map_range(x, in_min, in_max, out_min, out_max):
     """
     Maps a number from one range to another.
     Note: This implementation handles values < in_min differently than arduino's map function does.
+
     :return: Returns value mapped to new range
     :rtype: float
     """