Empty separator convention for inputs/outputs is invalid table markdown syntax

[bizz84]

This is a valid markdown table:

input1	input2		output
1	2		3

This isn't.

| input1 |input2|| output | | --- | -------|| ------- | | 1 | 2 || 3 |

It would be desirable to ensure all tables are rendered correctly, while preserving the same rules for input/output fields