edition = "2021"
max_width = 100

# NOTE ON UNSTABLE OPTIONS
#
# `imports_granularity`, `group_imports` and `derive_debug` are nightly-only
# rustfmt features. rust-toolchain.toml pins stable, so listing them here emits
# a warning per crate per file and buys nothing. They are intentionally absent
# rather than commented out: an unrecognised key is a warning, a commented key
# is a trap for whoever re-enables nightly.
#
# If this project ever moves to nightly rustfmt, add:
#   imports_granularity = "Crate"
#   group_imports = "StdExternalCrate"
#   derive_debug = false
# as a separate commit, so the diff is auditable.

# Trailing comma on match arms adds vertical noise in the evaluator, which is
# almost entirely match expressions.
match_block_trailing_comma = false

# Use small heuristics instead of the unstable ones.
use_small_heuristics = "Max"