Method fmt

crates/fs-utils/src/lockfile.rs:117–123

(&self, f: &mut fmt::Formatter<'_>)

    impl fmt::Display for LockError {
        fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
            write!(f, "failed to lock {}", self.path.display())?;
            if let Some(contents) = &self.existing_contents {
                write!(f, " (existing contents: {:?})", contents)?;
            }
            Ok(())
        }
    }

    impl StdError for LockError {