Corrected off-by-one error in __init__

Author: Margaret Matocha

adafruit_display_shapes/rect.py

@@ -69,11 +69,11 @@ def __init__(self, x, y, width, height, *, fill=None, outline=None, stroke=1):
             for w in range(width):
                 for line in range(stroke):
                     self._bitmap[w, line] = 1
-                    self._bitmap[w, height - 1 - line] = 1
+                    self._bitmap[w, height - line] = 1
             for _h in range(height):
                 for line in range(stroke):
                     self._bitmap[line, _h] = 1
-                    self._bitmap[width - 1 - line, _h] = 1
+                    self._bitmap[width - line, _h] = 1
 
         if fill is not None:
             self._palette[0] = fill