Remove and hide analyzer cli flags.

pkg/analyzer/lib/src/command_line/arguments.dart

Index: pkg/analyzer/lib/src/command_line/arguments.dart
diff --git a/pkg/analyzer/lib/src/command_line/arguments.dart b/pkg/analyzer/lib/src/command_line/arguments.dart
index fe113b69011cf64fff20c4a85c8d79b7bfbba6be..f120ad0ea025b0b362aba2f912373de6a0727e48 100644
--- a/pkg/analyzer/lib/src/command_line/arguments.dart
+++ b/pkg/analyzer/lib/src/command_line/arguments.dart
@@ -160,7 +160,7 @@ void defineAnalysisArguments(ArgParser parser, {bool hide: true, ddc: false}) {
       hide: hide);
   parser.addOption(packagesOption,
       help: 'The path to the package resolution configuration file, which '
-          'supplies a mapping of package names to paths. This option cannot be '
+          'supplies a mapping of package names\nto paths. This option cannot be '
           'used with --package-root.',
       hide: ddc);
   parser.addOption(sdkSummaryPathOption,