Fix formatting

@@ -179,7 +179,8 @@ abstract class PdfAnnotBase {
     this.subject,
     this.subject,
     this.author,
     this.author,
   }) {
   }) {
-    this.flags = flags ?? {
+    this.flags = flags ??
+        {
           PdfAnnotFlags.print,
           PdfAnnotFlags.print,
         };
         };
   }
   }