message: Remove "Expected: execs" from testsuite error.
  That message was not helpful.
diff: use std::env;
  use std::ffi::OsStr;
  -use std::fmt;
  use std::fs;
  use std::os;
  use std::path::{Path, PathBuf};
  @@ -725,7 +724,7 @@ impl Execs {
  self.ran = true;
  let p = (&self.process_builder).clone().unwrap();
  if let Err(e) = self.match_process(&p) {
  - panic!("\nExpected: {:?}\n but: {}", self, e)
  + panic!("\n{}", e)
  }
  }
  @@ -733,7 +732,7 @@ impl Execs {
  pub fn run_output(&mut self, output: &Output) {
  self.ran = true;
  if let Err(e) = self.match_output(output) {
  - panic!("\nExpected: {:?}\n but: {}", self, e)
  + panic!("\n{}", e)
  }
  }
  @@ -1006,10 +1005,11 @@ impl Execs {
  Ok(())
  } else {
  bail!(
  - "differences:\n\
  + "{} did not match:\n\
  {}\n\n\
  other output:\n\
  `{}`",
  + description,
  diffs.join("\n"),
  String::from_utf8_lossy(extra)
  )
  @@ -1404,12 +1404,6 @@ fn zip_all<T, I1: Iterator<Item = T>, I2: Iterator<Item = T>>(a: I1, b: I2) -> Z
  }
  }
  -impl fmt::Debug for Execs {
  - fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
  - write!(f, "execs")
  - }
  -}
  -
  pub fn execs() -> Execs {
  Execs {
  ran: false,
  