tools/pyboard.py: Add missing line from example usage comments.
tools/pyboard.py: Add missing line from example usage comments.

kerneltask/micropython,kerneltask/micropython,henriknelson/micropython,bvernoux/micropython,pozetroninc/micropython,trezor/micropython,pfalcon/micropython,pozetroninc/micropython,tobbad/micropython,henriknelson/micropython,selste/micropython,selste/micropython,tobbad/micropython,pozetroninc/micropython,bvernoux/micropython,bvernoux/micropython,bvernoux/micropython,MrSurly/micropython,henriknelson/micropython,adafruit/circuitpython,pramasoul/micropython,kerneltask/micropython,adafruit/circuitpython,kerneltask/micropython,bvernoux/micropython,henriknelson/micropython,adafruit/circuitpython,pramasoul/micropython,henriknelson/micropython,pfalcon/micropython,trezor/micropython,pfalcon/micropython,adafruit/circuitpython,selste/micropython,selste/micropython,selste/micropython,pfalcon/micropython,tobbad/micropython,pozetroninc/micropython,kerneltask/micropython,pramasoul/micropython,MrSurly/micropython,trezor/micropython,trezor/micropython,pramasoul/micropython,MrSurly/micropython,tobbad/micropython,trezor/micropython,tobbad/micropython,pramasoul/micropython,adafruit/circuitpython,adafruit/circuitpython,MrSurly/micropython,pfalcon/micropython,pozetroninc/micropython,MrSurly/micropython