no need to split tilde sequences as everything is wrapped in nowiki tags

src/modules/core.js

@@ -361,7 +361,7 @@
 							text = text.replace( /<\/template>/g, '}}' );
 							text = text.replace( /<part>/g, '|' );
 
-							// Expand embedded tags (like <nowiki>)
+							// Expand embedded tags (like nowiki)
 							text = text.replace( new RegExp( '<ext><name>(.*?)<\\/name>(?:<attr>.*?<\\/attr>)*' +
 								'<inner>(.*?)<\\/inner><close>(.*?)<\\/close><\\/ext>', 'g' ), '&lt;$1&gt;$2$3' );
 
@@ -826,7 +826,7 @@
 						} );
 					}
 
-					appendText += ' ~~' + '~~' + '~\n';
+					appendText += ' ~~~~~\n';
 
 					logPage.edit( {
 						contents: appendText,

src/modules/submissions.js

@@ -427,8 +427,8 @@
 	AFCH.Submission.prototype.addNewComment = function ( text ) {
 		var commentText = $.trim( text );
 
-		if ( commentText.indexOf( '~~' + '~~' ) === -1 ) {
-			commentText += ' ~~' + '~~';
+		if ( commentText.indexOf( '~~~~' ) === -1 ) {
+			commentText += ' ~~~~';
 		}
 
 		this.comments.unshift( {
@@ -1135,7 +1135,7 @@
 			// $1 = article name
 			// $2 = article class or '' if not available
 			'accepted-submission': headerBegin +
-				'[[$1]] has been accepted ==\n{{subst:Afc talk|$1|class=$2|sig=~~' + '~~}}',
+				'[[$1]] has been accepted ==\n{{subst:Afc talk|$1|class=$2|sig=~~~~}}',
 
 			// $1 = full submission title
 			// $2 = short title
@@ -1162,9 +1162,9 @@
 			'comment-on-submission': '{{subst:AFC notification|comment|article=$1}}',
 
 			// $1 = article name
-			'g13-submission': '{{subst:Db-afc-notice|$1}} ~~' + '~~',
+			'g13-submission': '{{subst:Db-afc-notice|$1}} ~~~~',
 
-			'teahouse-invite': '{{subst:Wikipedia:Teahouse/AFC invitation|sign=~~' + '~~}}'
+			'teahouse-invite': '{{subst:Wikipedia:Teahouse/AFC invitation|sign=~~~~}}'
 		} );
 	}