correct comment line in example

Author: jefftheprogrammer

docs/source/api/vision/index.rst

@@ -82,7 +82,7 @@ You can access the position using ``m.bearing`` and ``m.distance``.
 
    for m in markers:
        print(m.bearing)  # Bearing to the marker from the origin, in radians
-       print(m.distance)  # Bearing to the marker from the origin, in radians
+       print(m.distance)  # distance to the marker from the origin, in meters
 
 * ``m.bearing`` is equivalent to ``m.position.cylindrical.phi``.
 * ``m.distance`` is equivalent to ``m.position.cylindrical.p``.
@@ -108,4 +108,4 @@ conventionally is in the top left corner of the image.
 
    for m in markers:
        print(m.pixel_corners)  # Pixel positions of the marker corners within the image.
-       print(m.pixel_centre)  # Pixel positions of the centre of the marker within the image.
+       print(m.pixel_centre)  # Pixel positions of the centre of the marker within the image.