fix(transformer): Fix string interpolation for bindings.

Previously it did not stringify properties and used `+` instead of ` `.

modules/angular2/src/transform/bind_generator/generator.dart

@@ -111,4 +111,3 @@ Map<String, String> _createEventsMap(NgDeps ngDeps) {
   });
   return bindMap;
 }
-

modules/angular2/src/transform/bind_generator/visitor.dart

@@ -6,8 +6,8 @@ import 'package:angular2/src/transform/common/logging.dart';
 /// Visitor responsible for crawling the "annotations" value in a
 /// `registerType` call and pulling out the properties of any "bind"
 /// values found.
-class ExtractNamedExpressionVisitor extends Object with
-    RecursiveAstVisitor<Object> {
+class ExtractNamedExpressionVisitor extends Object
+    with RecursiveAstVisitor<Object> {
   final ConstantEvaluator _evaluator = new ConstantEvaluator();
   final List<String> bindConfig = [];
   final String nameToExtract;

modules/angular2/src/transform/common/options.dart

@@ -61,8 +61,7 @@ class TransformerOptions {
       MirrorMode mirrorMode: MirrorMode.none, bool initReflector: true,
       List<AnnotationDescriptor> customAnnotationDescriptors: const [],
       int optimizationPhases: DEFAULT_OPTIMIZATION_PHASES,
-      bool inlineViews: true,
-      bool generateChangeDetectors: true}) {
+      bool inlineViews: true, bool generateChangeDetectors: true}) {
     if (reflectionEntryPoints == null || reflectionEntryPoints.isEmpty) {
       reflectionEntryPoints = entryPoints;
     }

modules/angular2/src/transform/reflection_remover/codegen.dart

@@ -16,8 +16,9 @@ class Codegen {
   Codegen(String reflectionEntryPointPath, Iterable<String> newEntryPointPaths,
       {String prefix})
       : this.prefix = prefix == null ? _PREFIX_BASE : prefix,
-        importUris = newEntryPointPaths.map((p) =>
-            path.relative(p, from: path.dirname(reflectionEntryPointPath)).replaceAll('\\', '/')) {
+        importUris = newEntryPointPaths.map((p) => path
+            .relative(p, from: path.dirname(reflectionEntryPointPath))
+            .replaceAll('\\', '/')) {
     if (this.prefix.isEmpty) throw new ArgumentError.value('(empty)', 'prefix');
   }
 

modules/angular2/src/transform/reflection_remover/rewriter.dart

@@ -113,7 +113,9 @@ class Rewriter {
 
   String _importDebugReflectionCapabilities(ImportDirective node) {
     var uri = '${node.uri}';
-    uri = path.join(path.dirname(uri), 'debug_${path.basename(uri)}').replaceAll('\\', '/');
+    uri = path
+        .join(path.dirname(uri), 'debug_${path.basename(uri)}')
+        .replaceAll('\\', '/');
     var asClause = node.prefix != null ? ' as ${node.prefix}' : '';
     return 'import $uri$asClause;';
   }

modules/angular2/src/transform/template_compiler/change_detector_codegen.dart

@@ -424,7 +424,9 @@ class _CodegenState {
   String _genInterpolation(ProtoRecord r) {
     var res = new StringBuffer();
     for (var i = 0; i < r.args.length; ++i) {
-      res.write('${JSON.encode(r.fixedArgs[i])} + ${_localNames[r.args[i]]} +');
+      var name = _localNames[r.args[i]];
+      res.write(
+          '${JSON.encode(r.fixedArgs[i])} "\$\{$name == null ? "" : $name\}" ');
     }
     res.write(JSON.encode(r.fixedArgs[r.args.length]));
     return '$res';