[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Author: pre-commit-ci[bot]

TODO.md

@@ -8,4 +8,3 @@ The current implementation uses octal escape sequences (`\XXX`) but the tests ex
 2. [x] Update CHAR_MAP to use hex escapes instead of octal escapes
 3. [x] Keep simple escape sequences for special chars (\n, \r, \t, etc.)
 4. [x] Update the docstring to reflect correct format (\xXX instead of \oXXX)
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