all: Remove trailing spaces, per coding conventions.

.gitignore

CODECONVENTIONS.md

bare-arm/stm32f405.ld

esp8266/hspi_register.h

examples/embedding/Makefile.upylib

extmod/modubinascii.c

minimal/stm32f405.ld

mpy-cross/Makefile

py/asmarm.c

py/formatfloat.c

py/mkrules.mk

py/objtype.c

py/runtime.c

stmhal/boards/common.ld

stmhal/boards/stm32f401xd.ld

stmhal/boards/stm32f401xe.ld

stmhal/boards/stm32f405.ld

stmhal/boards/stm32f411.ld

stmhal/boards/stm32f429.ld

stmhal/boards/stm32l476xe.ld