phase3: nullfix arg-bang handler (argument_type/invalid_assignment). 872 -> 621

lib/widgets/desktop/desktop_plain_page.dart

@@ -43,7 +43,7 @@ class DesktopPlainPageState extends State<DesktopPlainPage> {
       padding: EdgeInsets.only(top: 20, left: 16.0, right: 16.0, bottom: 16.0),
       child: Center(
         child: Text(
-          widget.blog.title,
+          widget.blog.title!,
           style: TextStyle(
             fontWeight: FontWeight.bold,
             fontSize: 20,
@@ -55,7 +55,7 @@ class DesktopPlainPageState extends State<DesktopPlainPage> {
       padding: EdgeInsets.only(left: 16.0, right: 16.0, bottom: 20.0),
       child: MarkdownBody(
         shrinkWrap: true,
-        data: widget.blog.body,
+        data: widget.blog.body!,
       ),
     ));
 
@@ -64,7 +64,7 @@ class DesktopPlainPageState extends State<DesktopPlainPage> {
         title: S.of(context).blog,
         back: true,
         breadCrumbs: [
-          BreadCrumb(widget.blog.title, null),
+          BreadCrumb(widget.blog.title!, null),
         ],
         breadCrumbHeight: Constants.BREADCRUMB_HEIGHT,
       ),