Formatter: don't indent EOL comment at the beginning of a line.

pkg/analyzer/test/services/formatter_test.dart

Index: pkg/analyzer/test/services/formatter_test.dart
diff --git a/pkg/analyzer/test/services/formatter_test.dart b/pkg/analyzer/test/services/formatter_test.dart
index 85e68aa5e4f87307a7309924652b07bee862dd16..5ebaa88869d1ed5b737370fb4a529dda43fc47cf 100644
--- a/pkg/analyzer/test/services/formatter_test.dart
+++ b/pkg/analyzer/test/services/formatter_test.dart
@@ -184,6 +184,30 @@ main() {
           'class C {\n'
           '}\n'
       );
+      expectCUFormatsTo(
+          'main() {\n'
+          '//  print(1);\n'
+          '//  print(2);\n'
+          '  print(3);\n'
+          '}\n',
+          'main() {\n'
+          '//  print(1);\n'
+          '//  print(2);\n'
+          '  print(3);\n'
+          '}\n'
+      );
+      expectCUFormatsTo(
+          'class A {\n'
+          '//  int a;\n'
+          '//  int b;\n'
+          '  int c;\n'
+          '}\n',
+          'class A {\n'
+          '//  int a;\n'
+          '//  int b;\n'
+          '  int c;\n'
+          '}\n'
+      );
     });
 
     test('CU - nested functions', () {