Update testing messages

Author: justmobilize

tools/test-stubs.sh

@@ -7,7 +7,9 @@ rm -rf circuitpython-stubs .mypy_cache
 make stubs
 pip install --force-reinstall circuitpython-stubs/dist/circuitpython-stubs-*.tar.gz
 export MYPYPATH=circuitpython-stubs/
+echo "The following test should pass:"
 mypy -c 'import busio; b: busio.I2C; b.writeto(0x30, b"")'
+echo "The next two tests are expected to show type errors:"
 ! mypy -c 'import busio; b: busio.I2C; b.readfrom_into(0x30, b"")'
 ! mypy -c 'import busio; b: busio.I2C; b.write(0x30, b"")'
-echo "(The above two tests are expected to show type errors)"
+echo "Typing tests complete"