Function format_dir 

pub fn format_dir<P: AsRef<Path>>(
    dir_path: P,
    write: bool,
) -> Result<FormattingStats>

Format all supported files in a directory

Arguments

• dir_path - Path to the directory to format
• write - Whether to write the formatted output back to the files

Returns

• Ok(FormattingStats) - Statistics about the formatting operation
• Err - If formatting failed