message: Formatted file
diff: //! WebAssembly spec tests. It will convert the files indicated in TESTS
  //! from "/spectests/{MODULE}.wast" to "/src/spectests/{MODULE}.rs".
  use std::collections::HashMap;
  +use std::env;
  use std::fs;
  use std::io::{self, Read};
  use std::path::PathBuf;
  use std::time::SystemTime;
  use wabt::script::{Action, Command, CommandKind, ModuleBinary, ScriptParser, Value};
  use wabt::wasm2wat;
  -use std::env;
  static ENV_VAR: &str = "WASM_GENERATE_SPECTESTS";
  