diff --git a/src/helper/merge-html-plugin.ts b/src/helper/merge-html-plugin.ts
index 96eb5ce..3ca2fe3 100644
--- a/src/helper/merge-html-plugin.ts
+++ b/src/helper/merge-html-plugin.ts
@@ -19,14 +19,10 @@ export const mergeHTMLPlugin = (function () {
       .replace(/'/g, ''');
   }
 
-  /* plugin itself */
-
   const mergeHTMLPlugin: HLJSPlugin = {
-    // preserve the original HTML token stream
     'before:highlightElement': ({ el }: {el: Node}) => {
       originalStream = nodeStream(el);
     },
-    // merge it afterwards with the highlighted token stream
     'after:highlightElement': ({ el, result, text }: {el: Element; result: HighlightResult; text: string}) => {
       if (originalStream.length === 0) return;
 
@@ -37,8 +33,6 @@ export const mergeHTMLPlugin = (function () {
     }
   };
 
-  /* Stream merging support functions */
-
   interface Event {
     event: 'start' | 'stop';
     offset: number;
@@ -62,9 +56,6 @@ export const mergeHTMLPlugin = (function () {
             node: child
           });
           offset = _nodeStream(child, offset);
-          // Prevent void elements from having an end tag that would actually
-          // double them in the output. There are more void elements in HTML
-          // but we list only those realistically expected in code display.
           if (tag(child).match(/br|hr|img|input/) == null) {
             result.push({
               event: 'stop',
@@ -92,27 +83,9 @@ export const mergeHTMLPlugin = (function () {
         return (original[0].offset < highlighted[0].offset) ? original : highlighted;
       }
 
-      /*
-        To avoid starting the stream just before it should stop the order is
-        ensured that original always starts first and closes last:
-
-        if (event1 == 'start' && event2 == 'start')
-          return original;
-        if (event1 == 'start' && event2 == 'stop')
-          return highlighted;
-        if (event1 == 'stop' && event2 == 'start')
-          return original;
-        if (event1 == 'stop' && event2 == 'stop')
-          return highlighted;
-
-        ... which is collapsed to:
-        */
       return highlighted[0].event === 'start' ? original : highlighted;
     }
 
-    /**
-       * @param {Node} node
-       */
     function open (node: Node): void {
       function attributeString (attr: Attr): string {
         return ' ' + attr.nodeName + '="' + escapeHTML(attr.value) + '"';
@@ -134,12 +107,6 @@ export const mergeHTMLPlugin = (function () {
       result += escapeHTML(value.substring(processed, stream[0].offset));
       processed = stream[0].offset;
       if (stream === original) {
-        /*
-          On any opening or closing tag of the original markup we first close
-          the entire highlighted node stack, then render the original tag along
-          with all the following original tags at the same offset and then
-          reopen all the tags on the highlighted stack.
-          */
         nodeStack.reverse().forEach(close);
         do {
           render(stream.splice(0, 1)[0]);