Issue Summary

Commenting on a code block pre-populates the same comment again when trying to write a new comment.

Steps to Reproduce

1. Create a new Trello Card.
2. Enter a comment containing only a code block: ``` code block text ```
3. Press Ctrl-Enter to save the comment.
4. Click on "Write a comment..." to begin entering a new comment.
5. New comment automatically pre-populates with the previously saved code block.

Expected Results

New comments should not pre-populate the previous comment.

Actual Results

The code block is pre-populated in the new comment.

Workaround

Click on the Save button instead of saving with keyboard shortcut.