Since our nodebb supports tables, what about adding some love for them to the CSS ?

Markdown:

First Header | Second Header
------------ | -------------
Content from cell 1 | Content from cell 2
Content in the first column | Content in the second column

The result isn't that good:

I'm using this custom CSS in my NodeBB:

table
{
  font-size: 14px;
	border-collapse:collapse;
	margin:20px 0 0;
	padding:0;
}

table tr
{
	border-top:1px solid #ccc;
	background-color:#fff;
	margin:0;
	padding:0;
}

table tr:nth-child(2n)
{
	background-color:#f8f8f8;
}
table tr th[align="center"], table tr td[align="center"] {
	text-align:center;
}
table tr th, table tr td
{
	border:1px solid #ccc;
	text-align:left;
	margin:0;
	padding:6px 13px;
}

And the result is quite better:

Close-able, Mr Baris did the magic!