docs/library/machine.I2C.rst: Extend writeto to support a list of bufs.#4020

dpgeorge wants to merge 1 commit intomicropython:mastermicropython/micropython:masterfrom

dpgeorge:docs-machine-i2c-buflistdpgeorge/micropython:docs-machine-i2c-buflistCopy head branch name to clipboard