message: Fix inaccurate doc comment on `env_args`.
diff: @@ -367,12 +367,12 @@ fn output_err_info(cmd: &ProcessBuilder, stdout: &str, stderr: &str) -> String {
  ///
  /// then if this was not found
  ///
  -/// - `target.*.rustflags` from the manifest (Cargo.toml)
  -/// - `target.cfg(..).rustflags` from the manifest
  +/// - `target.*.rustflags` from the config (.cargo/config)
  +/// - `target.cfg(..).rustflags` from the config
  ///
  /// then if neither of these were found
  ///
  -/// - `build.rustflags` from the manifest
  +/// - `build.rustflags` from the config
  ///
  /// Note that if a `target` is specified, no args will be passed to host code (plugins, build
  /// scripts, ...), even if it is the same as the target.
  