Do not print anything on broken pipe errors

Dependencies

• [2] SNZ3OAMC use native external subcommand support instead of hand-rolled one
• [3] RJMQSZER External commands
• [*] SXEYMYF7 Fixing the bad changes in history (unfortunately, by rebooting).

Change contents

• replacement in pijul/src/main.rs at line 135
  [2.169]→[2.169:236](∅→∅)
  − writeln!(std::io::stderr(), "Error: {}", e).unwrap_or(());
  [2.169]

  [2.236]
  + match e.downcast::<std::io::Error>() {

  + Ok(e) if e.kind() == std::io::ErrorKind::BrokenPipe => {}

  + Ok(e) => writeln!(std::io::stderr(), "Error: {}", e).unwrap_or(()),

  + Err(e) => writeln!(std::io::stderr(), "Error: {}", e).unwrap_or(()),

  + }