fix all instances of "the the"

pkg/compiler/lib/src/cps_ir/loop_hierarchy.dart

Index: pkg/compiler/lib/src/cps_ir/loop_hierarchy.dart
diff --git a/pkg/compiler/lib/src/cps_ir/loop_hierarchy.dart b/pkg/compiler/lib/src/cps_ir/loop_hierarchy.dart
index 35d9b761fb4af039ae279987aee39ac1891bf6d8..60129af596aadc9d1e25a9bd374ca27522368919 100644
--- a/pkg/compiler/lib/src/cps_ir/loop_hierarchy.dart
+++ b/pkg/compiler/lib/src/cps_ir/loop_hierarchy.dart
@@ -134,7 +134,7 @@ class LoopHierarchy {
     return _markInnerLoop(target, catchLoop);
   }
 
-  /// Returns the the innermost loop that effectively encloses both
+  /// Returns the innermost loop that effectively encloses both
   /// c1 and c2 (or `null` if there is no such loop).
   Continuation lowestCommonAncestor(Continuation c1, Continuation c2) {
     int d1 = getDepth(c1), d2 = getDepth(c2);