Run dartfmt on all files under runtime.

runtime/tests/vm/dart/optimized_stacktrace_line_and_column_test.dart

Index: runtime/tests/vm/dart/optimized_stacktrace_line_and_column_test.dart
diff --git a/runtime/tests/vm/dart/optimized_stacktrace_line_and_column_test.dart b/runtime/tests/vm/dart/optimized_stacktrace_line_and_column_test.dart
index 0460aaef00dd6de21b6828f72fa2dfe0d13c11c5..4bcb31e2b824833f8aee82af9e427a9a843df8c4 100644
--- a/runtime/tests/vm/dart/optimized_stacktrace_line_and_column_test.dart
+++ b/runtime/tests/vm/dart/optimized_stacktrace_line_and_column_test.dart
@@ -8,7 +8,7 @@ import "package:expect/expect.dart";
 foo(x) => bar(x);
 
 bar(x) {
-  if (x == null) throw 42;  // throw at position 11:18
+  if (x == null) throw 42; // throw at position 11:18
   return x + 1;
 }
 
@@ -21,11 +21,13 @@ test1() {
     String s = stacktrace.toString();
     print(s);
     Expect.isFalse(s.contains("-1:-1"), "A");
-    Expect.isTrue(s.contains("optimized_stacktrace_line_and_column_test.dart:11:18"), "B");
+    Expect.isTrue(
+        s.contains("optimized_stacktrace_line_and_column_test.dart:11:18"),
+        "B");
   }
 
   // Optimized.
-  for (var i=0; i<10000; i++) foo(42);
+  for (var i = 0; i < 10000; i++) foo(42);
   try {
     foo(null);
     Expect.fail("Unreachable");
@@ -33,18 +35,19 @@ test1() {
     String s = stacktrace.toString();
     print(s);
     Expect.isFalse(s.contains("-1:-1"), "C");
-    Expect.isTrue(s.contains("optimized_stacktrace_line_and_column_test.dart:11:18"), "D");
+    Expect.isTrue(
+        s.contains("optimized_stacktrace_line_and_column_test.dart:11:18"),
+        "D");
   }
 }
 
-
 // (2) Test checked mode exceptions.
 maximus(x) => moritz(x);
 
 moritz(x) {
-  if (x == 333)  return 42 ? 0 : 1;  // Throws in checked mode.
-  if (x == 777)   {
-    bool b = x;  // Throws in checked mode.
+  if (x == 333) return 42 ? 0 : 1; // Throws in checked mode.
+  if (x == 777) {
+    bool b = x; // Throws in checked mode.
     return b;
   }
 
@@ -52,7 +55,7 @@ moritz(x) {
 }
 
 test2() {
-  for (var i=0; i<100000; i++) maximus(42);
+  for (var i = 0; i < 100000; i++) maximus(42);
   try {
     maximus(333);
   } catch (e, stacktrace) {