Move spaces from before comments to within comments

tests/lib/convert/utf8_test.dart

Index: tests/lib/convert/utf8_test.dart
diff --git a/tests/lib/convert/utf8_test.dart b/tests/lib/convert/utf8_test.dart
index f24dffc96f2e108495553e13f5e43c6ceebd200d..c63ae8b85d26de6e1ea3bae3562fea25efbc053c 100644
--- a/tests/lib/convert/utf8_test.dart
+++ b/tests/lib/convert/utf8_test.dart
@@ -29,8 +29,8 @@ void testDecodeSlice() {
   Expect.equals("BCD", decoder.convert(ascii, 1, 4));
   Expect.equals("ABCD", decoder.convert(ascii, 0, 4));
 
-  Expect.throws(() => decoder.convert(ascii, -1));    // start < 0.
-  Expect.throws(() => decoder.convert(ascii, 6));     // start > length
+  Expect.throws(() => decoder.convert(ascii, -1)); //    start < 0.
+  Expect.throws(() => decoder.convert(ascii, 6)); //     start > length
   Expect.throws(() => decoder.convert(ascii, 0, -1)); // end < 0
   Expect.throws(() => decoder.convert(ascii, 0, 6));  // end > length
   Expect.throws(() => decoder.convert(ascii, 3, 2));  // end < start