message: Add possibility to remove process exit code
diff: @@ -566,6 +566,14 @@ impl Execs {
  self
  }
  + /// Remove exit code check for the process.
  + ///
  + /// By default, the expected exit code is `0`.
  + pub fn without_status(&mut self) -> &mut Self {
  + self.expect_exit_code = None;
  + self
  + }
  +
  /// Verify that stdout contains the given contiguous lines somewhere in
  /// its output.
  /// See `lines_match` for supported patterns.
  