message: Inline Execs::_with_stderr
diff: @@ -552,12 +552,8 @@ impl Execs {
  /// Verify that stderr is equal to the given lines.
  /// See `lines_match` for supported patterns.
  pub fn with_stderr<S: ToString>(mut self, expected: S) -> Execs {
  - self._with_stderr(&expected);
  - self
  - }
  -
  - fn _with_stderr(&mut self, expected: &ToString) {
  self.expect_stderr = Some(expected.to_string());
  + self
  }
  /// Verify the exit code from the process.
  