[FIX] web_editor: remove copy paste unwanted newline

Before this commit:

- When you try to paste text beside a text which is in code formate it
  puts the new text in new line with smaller font.

- When we try to paste text in code formate in new line then it will
  give a blank space below the pasted text

After this commit:

- when you try to paste text beside a text which is in code formate it
  puts the pasted text in new line with original fontsize.

- When we paste the text in code formate in new line then it will not give
  a empty line below it,

Task-2683455

closes odoo/odoo#106488

X-original-commit: bf7835e80ffa70236dca4b4b8fb4edb45d42f46a
Signed-off-by: David Monjoie (dmo) <dmo@odoo.com>

addons/web_editor/static/src/js/editor/odoo-editor/src/commands/commands.js

@@ -20,6 +20,7 @@ import {
     isBlock,
     isColorGradient,
     isContentTextNode,
+    isEmptyBlock,
     isSelectionFormat,
     isShrunkBlock,
     isVisible,
@@ -262,6 +263,9 @@ export const editorCommands = {
                     if (offset) {
                         const [left, right] = splitElement(currentNode.parentElement, offset);
                         currentNode = insertBefore ? right : left;
+                        if (isEmptyBlock(right)) {
+                            right.remove();
+                        }
                     } else {
                         currentNode = currentNode.parentElement;
                     }

addons/web_editor/static/src/js/editor/odoo-editor/src/utils/utils.js

@@ -1443,6 +1443,7 @@ const paragraphRelatedElements = [
     'H4',
     'H5',
     'H6',
+    'PRE',
 ];
 
 /**