dart fix --apply --code=prefer_single_quotes

Author: greglittlefield-wf

example/js_components/js_components.dart

@@ -62,21 +62,21 @@ class _IndexComponent extends react.Component2 {
           DialogActions(
             {},
             Button({
-              'color': "primary",
+              'color': 'primary',
               'onClick': handleClose,
             }, 'OK'),
           )),
       Typography({
-        'variant': "h4",
+        'variant': 'h4',
         'gutterBottom': true,
       }, 'Material-UI'),
       Typography({
-        'variant': "subtitle1",
+        'variant': 'subtitle1',
         'gutterBottom': true,
       }, 'example project'),
       Button({
-        'variant': "contained",
-        'color': "secondary",
+        'variant': 'contained',
+        'color': 'secondary',
         'onClick': handleClick,
       }, Icon({}, 'fingerprint'), 'Super Secret Password'),
     );

example/test/call_and_nosuchmethod_test.dart

@@ -1,8 +1,8 @@
 // ignore_for_file: deprecated_member_use_from_same_package
-import "dart:html";
+import 'dart:html';
 
-import "package:react/react_dom.dart" as react_dom;
-import "package:react/react.dart" as react;
+import 'package:react/react_dom.dart' as react_dom;
+import 'package:react/react.dart' as react;
 
 class _CustomComponent extends react.Component {
   render() {

example/test/get_dom_node_test.dart

@@ -1,12 +1,12 @@
 // ignore_for_file: deprecated_member_use_from_same_package
-import "dart:html";
+import 'dart:html';
 
-import "package:react/react.dart" as react;
-import "package:react/react_dom.dart" as react_dom;
+import 'package:react/react.dart' as react;
+import 'package:react/react_dom.dart' as react_dom;
 
 customAssert(text, condition) {
   if (condition)
-    print("${text} passed");
+    print('${text} passed');
   else
     throw (text);
 }
@@ -17,7 +17,7 @@ class _ChildComponent extends react.Component {
   var counter = 0;
 
   render() => react.div({}, [
-        "Test element",
+        'Test element',
         counter.toString(),
         react.button({
           'type': 'button',
@@ -37,25 +37,25 @@ class SimpleComponent extends react.Component {
   var refToSpan;
   var refToElement;
 
-  componentWillMount() => print("mount");
+  componentWillMount() => print('mount');
 
-  componentWillUnmount() => print("unmount");
+  componentWillUnmount() => print('unmount');
 
   componentDidMount() {
-    customAssert("ref to span return span ", refToSpan.text == "Test");
-    customAssert("findDOMNode works on this", react_dom.findDOMNode(this) != null);
-    customAssert("random ref resolves to null", this.ref("someRandomRef") == null);
+    customAssert('ref to span return span ', refToSpan.text == 'Test');
+    customAssert('findDOMNode works on this', react_dom.findDOMNode(this) != null);
+    customAssert('random ref resolves to null', this.ref('someRandomRef') == null);
   }
 
   var counter = 0;
 
   render() => react.div({}, [
         react.span({
           'key': 'span1',
-          "ref": (ref) {
+          'ref': (ref) {
             refToSpan = ref;
           }
-        }, "Test"),
+        }, 'Test'),
         react.span({'key': 'span2'}, counter),
         react.button({
           'type': 'button',
@@ -66,7 +66,7 @@ class SimpleComponent extends react.Component {
         react.br({'key': 'br'}),
         ChildComponent({
           'key': 'child',
-          "ref": (ref) {
+          'ref': (ref) {
             refToElement = ref;
           }
         }),

example/test/order_test.dart

@@ -1,13 +1,13 @@
 // ignore_for_file: deprecated_member_use_from_same_package
 import 'dart:html';
 
-import "package:react/react.dart" as react;
-import "package:react/react_dom.dart" as react_dom;
+import 'package:react/react.dart' as react;
+import 'package:react/react_dom.dart' as react_dom;
 
 class _Item extends react.Component {
   componentWillReceiveProps(newProps) {
-    print("Old props: $props");
-    print("New props: $newProps");
+    print('Old props: $props');
+    print('New props: $newProps');
   }
 
   shouldComponentUpdate(nextProps, nextState) {

example/test/react_test.dart

@@ -1,8 +1,8 @@
-import "dart:html";
+import 'dart:html';
 
-import "package:react/react_dom.dart" as react_dom;
+import 'package:react/react_dom.dart' as react_dom;
 
-import "react_test_components.dart";
+import 'react_test_components.dart';
 
 void main() {
   react_dom.render(