v0.1.2

Distribution and documentation; no formatting behavior changed. macOS users can now install with brew install jbeda/tap/mdreflow, the README documents modes, configuration, excludes, and the exit-code contract directly instead of deferring everything to --help, and --help itself got cleaner and more complete.

Added

• Homebrew: brew install jbeda/tap/mdreflow on macOS, brew install --cask jbeda/tap/mdreflow on Linux (Homebrew 4.5+ cask support is preliminary there).
  Each release publishes a cask to jbeda/homebrew-tap; release tarballs and go install remain for everything else.

Fixed

• --help no longer prints a stray one-line usage pointer to stderr above the full help text; stderr is now empty and the full documentation goes to stdout alone.

Changed

• README now documents modes, configuration, excludes, and the exit-code contract directly (mirroring --help, which stays canonical), and the install section points at the release binaries.
• Help text now documents that --check/--diff work in stdin mode (reporting the input as -) and that --strip-sentence-terminal-breaks is flag-only with no config-file key.

Full changelog: v0.1.1...v0.1.2