fix: Render line breaks properly on Super editor Show markdown (#2982)

* fix: Render line breaks properly on Super editor Show markdown

* chore: fix lint error

packages/web/src/javascripts/Components/SuperEditor/Plugins/MarkdownPreviewPlugin/MarkdownPreviewPlugin.tsx

@@ -1,9 +1,8 @@
 import { useLexicalComposerContext } from '@lexical/react/LexicalComposerContext'
 import { useEffect } from 'react'
 import { $createCodeNode } from '@lexical/code'
-import { $createTextNode, $getRoot, $isParagraphNode } from 'lexical'
+import { $createTextNode, $getRoot } from 'lexical'
 import { MarkdownTransformers } from '../../MarkdownTransformers'
-import { $dfs } from '@lexical/utils'
 import { $convertToMarkdownString } from '../../Lexical/Utils/MarkdownExport'
 
 type Props = {
@@ -16,14 +15,6 @@ export default function MarkdownPreviewPlugin({ onMarkdown }: Props): JSX.Elemen
   useEffect(() => {
     editor.update(() => {
       const root = $getRoot()
-      for (const { node } of $dfs()) {
-        if (!$isParagraphNode(node)) {
-          continue
-        }
-        if (node.isEmpty()) {
-          node.remove()
-        }
-      }
       const markdown = $convertToMarkdownString(MarkdownTransformers)
       root.clear().append($createCodeNode('markdown').append($createTextNode(markdown)))
       root.selectEnd()

packages/web/src/javascripts/Components/SuperEditor/Tools/HeadlessSuperConverter.tsx

@@ -4,7 +4,6 @@ import {
   $createParagraphNode,
   $getRoot,
   $insertNodes,
-  $isParagraphNode,
   LexicalEditor,
   LexicalNode,
   SerializedLexicalNode,
@@ -151,14 +150,6 @@ export class HeadlessSuperConverter implements SuperConverterServiceInterface {
         switch (toFormat) {
           case 'txt':
           case 'md': {
-            for (const { node: paragraph } of $dfs()) {
-              if (!$isParagraphNode(paragraph)) {
-                continue
-              }
-              if (paragraph.isEmpty()) {
-                paragraph.remove()
-              }
-            }
             content = $convertToMarkdownString(MarkdownTransformers)
             resolve()
             break