message: [vcpkg-export] Tweak error formatting
diff: @@ -246,9 +246,12 @@ namespace vcpkg::Commands::Export
  const bool zip = options.switches.find(OPTION_ZIP) != options.switches.cend();
  const bool _7zip = options.switches.find(OPTION_7ZIP) != options.switches.cend();
  - Checks::check_exit(VCPKG_LINE_INFO,
  - raw || nuget || zip || _7zip,
  - "Must provide at least one of the following options: --raw --nuget --zip --7zip");
  + if (!raw && !nuget && !zip && !_7zip && !dryRun)
  + {
  + System::println(System::Color::error, "Must provide at least one export type: --raw --nuget --zip --7zip");
  + System::print(example);
  + Checks::exit_fail(VCPKG_LINE_INFO);
  + }
  auto maybe_nuget_id = maybe_lookup(options.settings, OPTION_NUGET_ID);
  auto maybe_nuget_version = maybe_lookup(options.settings, OPTION_NUGET_VERSION);
  