Address review comments from https://chromiumcodereview.appspot.com/10454049/.

lib/compiler/implementation/ssa/builder.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 class Interceptors {
   Compiler compiler;
   Interceptors(Compiler this.compiler);
 
   SourceString mapOperatorToMethodName(Operator op) {
     String name = op.source.stringValue;
@@ skipping 3104 matching lines @@
   visitCaseMatch(CaseMatch node) {
     compiler.internalError('SsaBuilder.visitCaseMatch');
   }
 
   visitTryStatement(TryStatement node) {
     work.allowSpeculativeOptimization = false;
     // Save the current locals. The catch block and the finally block
     // must not reuse the existing locals handler. None of the variables
     // that have been defined in the body-block will be used, but for
     // loops we will add (unnecessary) phis that will reference the body
-    // variables. This will make it look as if the variables were used
+    // variables. This makes it look as if the variables were used
     // in a non-dominated block.
     LocalsHandler savedLocals = new LocalsHandler.from(localsHandler);
     HBasicBlock enterBlock = openNewBlock();
     HTry tryInstruction = new HTry();
     List<HBasicBlock> blocks = <HBasicBlock>[];
     blocks.add(close(tryInstruction));
 
     HBasicBlock tryBody = graph.addNewBlock();
     enterBlock.addSuccessor(tryBody);
     open(tryBody);
@@ skipping 266 matching lines @@
                                    <HInstruction>[target, input],
                                    HType.STRING));
     return builder.pop();
   }
 
   HInstruction result(Node node) {
     flushLiterals(node);
     return prefix;
   }
 }