diff --git a/src/node/db/Pad.js b/src/node/db/Pad.js
index 965f2793f..a34668987 100644
--- a/src/node/db/Pad.js
+++ b/src/node/db/Pad.js
@@ -87,7 +87,7 @@ Pad.prototype.appendRevision = async function appendRevision(aChangeset, author)
 
   // ex. getNumForAuthor
   if (author !== '') {
-    this.pool.putAttrib(['author', author || '']);
+    this.pool.putAttrib(['author', author]);
   }
 
   if (newRev % 100 === 0) {
diff --git a/src/node/utils/ExportHtml.js b/src/node/utils/ExportHtml.js
index 999b22639..c3e229f2a 100644
--- a/src/node/utils/ExportHtml.js
+++ b/src/node/utils/ExportHtml.js
@@ -314,7 +314,7 @@ const getHTMLFromAtext = async (pad, atext, authorColors) => {
       await hooks.aCallAll('getLineHTMLForExport', context);
       // To create list parent elements
       if ((!prevLine || prevLine.listLevel !== line.listLevel) ||
-          (prevLine && line.listTypeName !== prevLine.listTypeName)) {
+          (line.listTypeName !== prevLine.listTypeName)) {
         const exists = _.find(openLists, (item) => (
           item.level === line.listLevel && item.type === line.listTypeName)
         );
@@ -414,7 +414,7 @@ const getHTMLFromAtext = async (pad, atext, authorColors) => {
       if ((!nextLine ||
            !nextLine.listLevel ||
            nextLine.listLevel < line.listLevel) ||
-          (nextLine && line.listTypeName !== nextLine.listTypeName)) {
+          (line.listTypeName !== nextLine.listTypeName)) {
         let nextLevel = 0;
         if (nextLine && nextLine.listLevel) {
           nextLevel = nextLine.listLevel;
diff --git a/src/static/js/ace2_inner.js b/src/static/js/ace2_inner.js
index 429fef7cd..4858aa1b4 100644
--- a/src/static/js/ace2_inner.js
+++ b/src/static/js/ace2_inner.js
@@ -3782,7 +3782,7 @@ function Ace2Inner() {
 
   // We apply the height of a line in the doc body, to the corresponding sidediv line number
   const updateLineNumbers = () => {
-    if (!currentCallStack || currentCallStack && !currentCallStack.domClean) return;
+    if (!currentCallStack || !currentCallStack.domClean) return;
 
     // Refs #4228, to avoid layout trashing, we need to first calculate all the heights,
     // and then apply at once all new height to div elements
diff --git a/src/static/js/contentcollector.js b/src/static/js/contentcollector.js
index 1c601cc54..c250008bb 100644
--- a/src/static/js/contentcollector.js
+++ b/src/static/js/contentcollector.js
@@ -195,7 +195,7 @@ const makeContentCollector = (collectStyles, abrowser, apool, className2Author)
       }
     }
 
-    if (listType === 'none' || !listType) {
+    if (listType === 'none') {
       delete state.lineAttributes.list;
     } else {
       state.lineAttributes.list = listType;