rustfmt.toml

extensions: address ast deprecations introduced in Python 3.12

Tests would fail with:
  .../mercurial/extensions.py:910: DeprecationWarning: ast.Str is deprecated and will be removed in Python 3.14; use ast.Constant instead
    if isinstance(a, ast.Str):
  .../mercurial/extensions.py:912: DeprecationWarning: ast.Bytes is deprecated and will be removed in Python 3.14; use ast.Constant instead
    elif isinstance(a, ast.Bytes):
  .../mercurial/extensions.py:913: DeprecationWarning: Attribute s is deprecated and will be removed in Python 3.14; use value instead
    name = a.s

edition = "2018"
max_width = 79
wrap_comments = true
error_on_line_overflow = true