Let me try:
wget https://github.com/nodemcu/nodemcu-firmware/releases/download/0.9.6-dev_20150704/nodemcu_float_0.9.6-dev_20150704.bin
git clone https://github.com/themadinventor/esptool.git
cd esptool
sudo python2 ./esptool.py --port /dev/ttyUSB0 write_flash 0x00000 ../nodemcu_float_0.9.6-dev_20150704.bin
When I preview the above, nothing gets modified. Is it only when hitting post that something gets changed?
If so, I would guess it is a bug. IMHO nothing inside code tags should get modified at all.