Tweak corelib files so dartfmt can do a better job. Use // comments to force line wrapping for long…

sdk/lib/internal/internal.dart

Index: sdk/lib/internal/internal.dart
diff --git a/sdk/lib/internal/internal.dart b/sdk/lib/internal/internal.dart
index 512bc21c2d82172dec23a3aa442c61611df39d90..099c0ad1e8870a4c6d626537556730b74ecdf20c 100644
--- a/sdk/lib/internal/internal.dart
+++ b/sdk/lib/internal/internal.dart
@@ -20,28 +20,28 @@ part 'symbol.dart';
 // Powers of 10 above that are only approximate due to lack of precission.
 // Used by double-parsing.
 const POWERS_OF_TEN = const [
-                        1.0,  /*  0 */
-                       10.0,
-                      100.0,
-                     1000.0,
-                    10000.0,
-                   100000.0,  /*  5 */
-                  1000000.0,
-                 10000000.0,
-                100000000.0,
-               1000000000.0,
-              10000000000.0,  /* 10 */
-             100000000000.0,
-            1000000000000.0,
-           10000000000000.0,
-          100000000000000.0,
-         1000000000000000.0,  /*  15 */
-        10000000000000000.0,
-       100000000000000000.0,
-      1000000000000000000.0,
-     10000000000000000000.0,
-    100000000000000000000.0,  /*  20 */
-   1000000000000000000000.0,
+  1.0, // 0
+  10.0,
+  100.0,
+  1000.0,
+  10000.0,
+  100000.0, // 5
+  1000000.0,
+  10000000.0,
+  100000000.0,
+  1000000000.0,
+  10000000000.0, // 10
+  100000000000.0,
+  1000000000000.0,
+  10000000000000.0,
+  100000000000000.0,
+  1000000000000000.0, // 15
+  10000000000000000.0,
+  100000000000000000.0,
+  1000000000000000000.0,
+  10000000000000000000.0,
+  100000000000000000000.0, // 20
+  1000000000000000000000.0,
   10000000000000000000000.0,
 ];
 
@@ -55,7 +55,7 @@ class CodeUnits extends UnmodifiableListBase<int> {
   CodeUnits(this._string);
 
   int get length => _string.length;
-  int operator[](int i) => _string.codeUnitAt(i);
+  int operator [](int i) => _string.codeUnitAt(i);
 
   static String stringOf(CodeUnits u) => u._string;
 }