Nesting dateline in opener or closer

volumes/frus1865p4.xml

@@ -22919,8 +22919,7 @@
                     <opener>
                         <dateline rendition="#right">[<placeName>Bradford</placeName>, <date
                                 when="1865-04-28" ana="#date_undated-inferred-from-document-content"
-                                calendar="gregorian">April 28, 1865</date>
-                        </dateline>]</opener>
+                                calendar="gregorian">April 28, 1865</date>]</dateline>]</opener>
                     <p rend="center">
                         <hi rend="italic">Copy of resolutions passed at a meeting of inhabitants of
                             Bradford on the 28th day of April</hi>, 1865.</p>

volumes/frus1901.xml

@@ -26297,11 +26297,10 @@
                                 and Minister Plenipotentiary of the Republic of Haiti, signed at
                                 Washington, October 18, 1899.</hi></head>
                         <opener>
-                            <dateline rendition="#right">
-                                <placeName>Washington</placeName>, <date when="1899-10-18"
+                            <dateline rendition="#right">[<placeName>Washington</placeName>, <date
+                                    when="1899-10-18"
                                     ana="#date_undated-inferred-from-document-head"
-                                    calendar="gregorian">October 18, 1899</date>
-                            </dateline>
+                                    calendar="gregorian">October 18, 1899</date>]</dateline>
                         </opener>
                         <p rend="flushleft">Protocol of an agreement between the United States and
                             Haiti, for the arbitration of the question of the liability and amount