Rule 13 - Spell numbers: make exclusions work again

[izmalk]

I'm trying to add an exclusion to the rule Rule#13 for the Day 0, Day 1, and Day 2 can be spelled with numbers as in the Software development lifecycle terminology.

Most of my attempts so far were unsuccessful:

• adding the strings to the aссept.txt file directly (see documentation);
• adding the exceptions section to the rule:

  exceptions:
    - Day 0
    - Day 1
    - Day 2
  

I managed to achieve the desired effect by modifying the regular expression in the Rule:

extends: substitution
message: "Consider using '%s' instead of '%s'"
link: https://docs.ubuntu.com/styleguide/en#numbers
scope:
  - heading
  - list
  - sentence
  - table.header
  - table.cell
level: warning
swap:
  (?<![\-\.\,:\/*-+]|day\s)0(?![\-\.\,:\/*-+]): zero
  (?<![\-\.\,:\/*-+]|day\s)1(?![\-\.\,:\/*-+])(?! Jan(?!uary)?| Feb(?!ruary)?| Mar(?!ch)?| Apr(?!il)?| May| Jun(?:e)?| Jul(?:y)?| Aug(?:ust)?| Sep(?:tember)?| Oct(?:ober)?| Nov(?:ember)?| Dec(?:ember)?): one
  (?<![\-\.\,:\/*-+]|day\s)2(?![\-\.\,:\/*-+])(?! Jan(?!uary)?| Feb(?!ruary)?| Mar(?!ch)?| Apr(?!il)?| May| Jun(?:e)?| Jul(?:y)?| Aug(?:ust)?| Sep(?:tember)?| Oct(?:ober)?| Nov(?:ember)?| Dec(?:ember)?): two
  (?<![\-\.\,:\/*-+])3(?![\-\.\,:\/*-+])(?! Jan(?!uary)?| Feb(?!ruary)?| Mar(?!ch)?| Apr(?!il)?| May| Jun(?:e)?| Jul(?:y)?| Aug(?:ust)?| Sep(?:tember)?| Oct(?:ober)?| Nov(?:ember)?| Dec(?:ember)?): three
  (?<![\-\.\,:\/*-+])4(?![\-\.\,:\/*-+])(?! Jan(?!uary)?| Feb(?!ruary)?| Mar(?!ch)?| Apr(?!il)?| May| Jun(?:e)?| Jul(?:y)?| Aug(?:ust)?| Sep(?:tember)?| Oct(?:ober)?| Nov(?:ember)?| Dec(?:ember)?): four
  (?<![\-\.\,:\/*-+])5(?![\-\.\,:\/*-+])(?! Jan(?!uary)?| Feb(?!ruary)?| Mar(?!ch)?| Apr(?!il)?| May| Jun(?:e)?| Jul(?:y)?| Aug(?:ust)?| Sep(?:tember)?| Oct(?:ober)?| Nov(?:ember)?| Dec(?:ember)?): five
  (?<![\-\.\,:\/*-+])6(?![\-\.\,:\/*-+])(?! Jan(?!uary)?| Feb(?!ruary)?| Mar(?!ch)?| Apr(?!il)?| May| Jun(?:e)?| Jul(?:y)?| Aug(?:ust)?| Sep(?:tember)?| Oct(?:ober)?| Nov(?:ember)?| Dec(?:ember)?): six
  (?<![\-\.\,:\/*-+])7(?![\-\.\,:\/*-+])(?! Jan(?!uary)?| Feb(?!ruary)?| Mar(?!ch)?| Apr(?!il)?| May| Jun(?:e)?| Jul(?:y)?| Aug(?:ust)?| Sep(?:tember)?| Oct(?:ober)?| Nov(?:ember)?| Dec(?:ember)?): seven
  (?<![\-\.\,:\/*-+])8(?![\-\.\,:\/*-+])(?! Jan(?!uary)?| Feb(?!ruary)?| Mar(?!ch)?| Apr(?!il)?| May| Jun(?:e)?| Jul(?:y)?| Aug(?:ust)?| Sep(?:tember)?| Oct(?:ober)?| Nov(?:ember)?| Dec(?:ember)?): eight
  (?<![\-\.\,:\/*-+])9(?![\-\.\,:\/*-+])(?! Jan(?!uary)?| Feb(?!ruary)?| Mar(?!ch)?| Apr(?!il)?| May| Jun(?:e)?| Jul(?:y)?| Aug(?:ust)?| Sep(?:tember)?| Oct(?:ober)?| Nov(?:ember)?| Dec(?:ember)?): nine

But I feel like this is too hacky and I'd prefer to have the exceptions or accept.txt to work for this narrow case.