How remove vertical gap between characters ? - eviltoast

Hi,

No matter what I try


<style>
.FlexColumn {display: flex;flex-flow: column nowrap }
</style>

<div class="FlexColumn">
	<div>X</div>
	<div>X</div>
	<div>X</div>
	<div>X</div>
	<div>X</div>
</div>
<!-- I tried many CSS trick here... -->
<div>
   <span>X</span><br><span>X</span><br><span>X</span><br><span>X</span>
</div>

I always get a vertical gap between the characters !

Any ideas ?

Thanks.