Fenced code block rendering

---
name: Bug report
about: Create a report to help us improve
title: 'Fenced code block rendering'
labels: 'rendering'
assignees: ''

---

**Describe the bug**
Fenced ascii art is not aligned

**To Reproduce**
```
┌──────────────────────────────────────────────────────────────────────┐
│ │
│ │
```
Rendered as:

**Expected behavior**
Should be aligned with mono space fonts

**Screenshots**
If applicable, add screenshots to help explain your problem.