change simpletest script to work with CPython and CircuitPython

Author: FoamyGuy

examples/bitmap_font_simpletest.py

@@ -1,18 +1,20 @@
 # SPDX-FileCopyrightText: 2021 ladyada for Adafruit Industries
 # SPDX-License-Identifier: MIT
 
-# Call this with the font file as the command line argument.
+"""
+This example loads a font and uses it to print an
+ASCII art representation of the given string specimen
+"""
 
-import os
-import sys
-
-# Add paths so this runs in CPython in-place.
-sys.path.append(os.path.join(sys.path[0], ".."))
 from adafruit_bitmap_font import bitmap_font  # pylint: disable=wrong-import-position
 
-sys.path.append(os.path.join(sys.path[0], "../test"))
-font = bitmap_font.load_font(sys.argv[1])
-specimen = "Adafruit CircuitPython" if len(sys.argv) == 2 else sys.argv[2]
+# you can change this to a different bdf or pcf font file
+font_file = "fonts/LeagueSpartan-Bold-16.bdf"
+
+# you can change the string that will get printed here
+specimen = "<3 Blinka"
+
+font = bitmap_font.load_font(font_file)
 
 _, height, _, dy = font.get_bounding_box()
 font.load_glyphs(specimen)