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new SyntaxWarning with python 3.8: invalid escape sequence \e

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Assessment

Difficulty
1/5
Estimated time
Under an hour
Newbie friendliness
45/100
Issue type
Bug
Clarity
Clearly specified
Activity status
Stale
Tech stack
python
Domain
testing

Research direction

Start with the string literals reported in tests/test_write.py at lines 8 and 14, then run the relevant test file under Python 3.8 or newer. Done means the tests still pass and no invalid escape sequence SyntaxWarning is emitted for these cases.

Written by the indexing model from the issue text.

Description

These warnings are new with python 3.8 (see the "Changed in version 3.8" note at the end of https://docs.python.org/3.8/reference/lexical_analysis.html#string-and-bytes-literals ):

=============================== warnings summary ===============================
tests/test_write.py:8
  /builddir/build/BUILD/tomlkit-0.5.3/tests/test_write.py:8: SyntaxWarning: invalid escape sequence \e
    d = {"foo": "\e\u25E6\r"}

tests/test_write.py:14
  /builddir/build/BUILD/tomlkit-0.5.3/tests/test_write.py:14: SyntaxWarning: invalid escape sequence \e
    assert loads(dumps(d))["foo"] == "\e\u25E6\r"

-- Docs: https://docs.pytest.org/en/latest/warnings.html
=============== 2 failed, 225 passed, 2 warnings in 2.28 seconds ===============
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