elf2bin.py: Verify/compile outputs two syntax warnings

[Vic-Y]

Basic Infos

• This issue complies with the issue POLICY doc.
• I have read the documentation at readthedocs and the issue is not addressed there.
• I have tested that the issue is present in current master branch (aka latest git).
• I have searched the issue tracker for a similar issue.
• If there is a stack dump, I have decoded it.
• I have filled out all fields below.

Platform

• Hardware: [ESP8266 LOLIN(WEMOS) D1 mini (clone)]
• Core Version:
• Development Env: [Arduino IDE]
• Operating System: [Ubuntu]

Settings in IDE

• Module: [LOLIN(WEMOS) D1 mini (clone)]
• Flash Mode: [DOUT(compatible)]
• Flash Size: [4MB]
• lwip Variant: [v2 Lower Memory]
• Reset Method:
• Flash Frequency: [40Mhz]
• CPU Frequency: [80Mhz]
• Upload Using: [SERIAL]
• Upload Speed: [115200]

Problem Description

Output window displays the following two syntax warnings during verify/compile:

/home/{user}/.arduino15/packages/esp8266/hardware/esp8266/3.1.2/tools/elf2bin.py:54: SyntaxWarning: invalid escape sequence '\s'
words = re.split('\s+', line)
/home/{user}/.arduino15/packages/esp8266/hardware/esp8266/3.1.2/tools/elf2bin.py:73: SyntaxWarning: invalid escape sequence '\s'
words = re.split('\s+', line)

I guess that the escape sequence '\s' should be replace by a space character, but since I do not know how elf2bin.py file works, I did not submit a commit.
words = re.split(' +', line)

[mcspr]

I guess that the escape sequence '\s' should be replace by a space character, but since I do not know how elf2bin.py file works, I did not submit a commit.
words = re.split(' +', line)

Fixed in master by #9034, should be part of the next release

[madurapa]

You can use dev in the version to fix this warning (note this may break at any time)

esp8266:
  board: nodemcuv2
  framework:
    version: dev

More information on https://esphome.io/components/esp8266.html