Roll Observatory deps (charted -> ^0.3.0)

packages/dart_style/example/format.dart

Index: packages/dart_style/example/format.dart
diff --git a/packages/dart_style/example/format.dart b/packages/dart_style/example/format.dart
index 4eec856e6d1528540f1c9cc48a1625acc52f2074..6d3ea6115eec577ef1871f6611441da026844e15 100644
--- a/packages/dart_style/example/format.dart
+++ b/packages/dart_style/example/format.dart
@@ -44,10 +44,6 @@ void runFormatter(String source, int pageWidth, {bool isCompilationUnit}) {
       result = formatter.formatStatement(source);
     }
 
-    if (debug.useAnsiColors) {
-      result = result.replaceAll(" ", debug.gray(debug.unicodeMidDot));
-    }
-
     drawRuler("before", pageWidth);
     print(source);
     drawRuler("after", pageWidth);