message: Add cargo doc --examples subcommand
diff: @@ -11,6 +11,10 @@ pub fn cli() -> App {
  .arg(opt(
  "open",
  "Opens the docs in a browser after the operation",
  + ))
  + .arg(opt(
  + "examples",
  + "Document all examples",
  ))
  .arg_package_spec(
  "Package to document",
  