chore: fix analyzer warnings

Author: vicb

lib/angular_dynamic.dart

@@ -6,9 +6,9 @@
 library angular.app.dynamic;
 
 import 'package:di/dynamic_injector.dart';
-import "package:angular/angular.dart";
+import 'package:angular/angular.dart';
 import 'package:angular/core/registry.dart';
-import "package:angular/core/parser/parser.dart" show ClosureMap;
+import 'package:angular/core/parser/parser.dart' show ClosureMap;
 import 'package:angular/change_detection/change_detection.dart';
 import 'package:angular/change_detection/dirty_checking_change_detector_dynamic.dart';
 import 'package:angular/core/registry_dynamic.dart';

lib/core/scope.dart

@@ -97,9 +97,9 @@ class ScopeLocals implements Map {
   void operator []=(String name, value) {
     _scope[name] = value;
   }
-  dynamic operator [](String name)
+  dynamic operator [](String name) =>
       // as Map needed to clear Dart2js warning
-      => ((_locals.containsKey(name) ? _locals : _scope) as Map)[name];
+      ((_locals.containsKey(name) ? _locals : _scope) as Map)[name];
 
   bool get isEmpty => _scope.isEmpty && _locals.isEmpty;
   bool get isNotEmpty => _scope.isNotEmpty || _locals.isNotEmpty;

lib/introspection.dart

@@ -6,10 +6,8 @@ library angular.introspection;
 import 'dart:html' as dom;
 import 'package:di/di.dart';
 import 'package:angular/introspection_js.dart';
-import 'package:angular/introspection.dart';
 import 'package:angular/core/module_internal.dart';
 import 'package:angular/core_dom/module_internal.dart';
-import 'package:angular/directive/module.dart';
 
 /**
  * Return the closest [ElementProbe] object for a given [Element].

lib/introspection_js.dart

@@ -7,7 +7,6 @@ import 'package:di/di.dart';
 import 'package:angular/introspection.dart';
 import 'package:angular/core/module_internal.dart';
 import 'package:angular/core_dom/module_internal.dart';
-import 'package:angular/directive/module.dart';
 
 /**
  * A global write only variable which keeps track of objects attached to the

lib/tools/transformer/expression_generator.dart

@@ -1,7 +1,6 @@
 library angular.tools.transformer.expression_generator;
 
 import 'dart:async';
-import 'dart:math' as math;
 import 'package:analyzer/src/generated/element.dart';
 import 'package:angular/core/parser/parser.dart';
 import 'package:angular/tools/html_extractor.dart';
@@ -177,7 +176,7 @@ final Map<String, Symbol> symbols = ${generateSymbolMap(symbols)};
     return '{\n${lines.join(",\n")}\n}';
   }
 
-  generateSymbolMap(Set<Strings> symbols) {
+  generateSymbolMap(Set<String> symbols) {
     var lines = symbols.map((key) => '  r"${key}": #$key');
     return '{\n${lines.join(",\n")}\n}';
   }

test/angular_spec.dart

@@ -103,7 +103,7 @@ main() {
         };
 
         var lib = currentMirrorSystem().findLibrary(new Symbol(libraryName));
-        return extractSymbols(lib);;
+        return extractSymbols(lib);
       }
 
       var names;

test/animate/css_animate_spec.dart

@@ -111,11 +111,11 @@ class MockAnimationLoop extends Mock implements AnimationLoop {
 
   List<LoopedAnimation> animations = [];
 
-  play(LoopedAnimation animation) {
+  void play(LoopedAnimation animation) {
     animations.add(animation);
   }
 
-  frame() {
+  void frame() {
     for(var animation in animations) {
       animation.read(time);
     }

test/core_dom/ng_element_spec.dart

@@ -1,7 +1,6 @@
 library ng_element_spec;
 
 import '../_specs.dart';
-import 'dart:html' as dom;
 
 void main() {
   describe('ngElement', () {

test/filter/order_by_spec.dart

@@ -6,10 +6,11 @@ import '../_specs.dart';
 class Name {
   String firstName;
   String lastName;
-  Name({String this.firstName, String this.lastName});
+  Name({this.firstName, this.lastName});
   operator ==(Name other) =>
       (firstName == other.firstName && lastName == other.lastName);
   String toString() => 'Name(firstName: $firstName, lastName: $lastName)';
+  int get hashCode => firstName.hashCode + lastName.hashCode;
 }