fix all instances of "the the"

pkg/compiler/lib/src/tree_ir/tree_ir_nodes.dart

Index: pkg/compiler/lib/src/tree_ir/tree_ir_nodes.dart
diff --git a/pkg/compiler/lib/src/tree_ir/tree_ir_nodes.dart b/pkg/compiler/lib/src/tree_ir/tree_ir_nodes.dart
index bb025f0da140a3d24f979809e33b10f6e95df68c..a1fe55edbfcd0802678c4f289ee8aa65e07fe2f4 100644
--- a/pkg/compiler/lib/src/tree_ir/tree_ir_nodes.dart
+++ b/pkg/compiler/lib/src/tree_ir/tree_ir_nodes.dart
@@ -396,7 +396,7 @@ class Conditional extends Expression {
 
 /// An && or || expression. The operator is internally represented as a boolean
 /// [isAnd] to simplify rewriting of logical operators.
-/// Note the the result of && and || is one of the arguments, which might not be
+/// Note the result of && and || is one of the arguments, which might not be
 /// boolean. 'ShortCircuitOperator' might have been a better name.
 class LogicalOperator extends Expression {
   Expression left;