tools/gen-cpydiff.py: Adjust subsections to sentence case.
tools/gen-cpydiff.py: Adjust subsections to sentence case.

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