<h1 dir="auto">Summary of the new feature/enhancement</h1>

<h1 dir="auto">Proposed technical implementation details (optional)</h1>
<h1 dir="auto">Environment</h1>
<p dir="auto">Windows build number: Microsoft Windows [Version 10.0.18362.356]<br>
Windows Terminal version (if applicable): 0.5.2681.0</p>
<h1 dir="auto">Steps to reproduce</h1>
<p dir="auto">Run this litle command in the terminal using a cmd.exe tab to produce a little box:</p>
<div class="highlight highlight-source-batchfile notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="echo ┌┐ &amp; echo └┘"><pre class="notranslate"><span class="pl-k">echo</span> ┌┐ <span class="pl-k">&amp;</span> <span class="pl-k">echo</span> └┘</pre></div>
<h1 dir="auto">Expected behavior</h1>
<p dir="auto">The box should have perfectly joined lines on all sides. Living in a monospaced environment where the box drawing characters are used to draw trees, boxes and other stuf perfect line joining is expected</p>
<h1 dir="auto">Actual behavior</h1>
<p dir="auto">The lines of the box are not vertically joined</p>
<p dir="auto"><a target="_blank" rel="noopener noreferrer nofollow" href="https://user-images.githubusercontent.com/8502209/66046865-eaa96a00-e526-11e9-9bd9-90396b006770.png"><img src="https://user-images.githubusercontent.com/8502209/66046865-eaa96a00-e526-11e9-9bd9-90396b006770.png" alt="image" style="max-width: 100%;"></a></p>