Typo error style correction

[mrGTB]

Not a bug, so I'll post it here in feedback.

When you go into the style properties here: General/Page Width Controller. You have this code displayed as an example people can use in that section.

Liquid example: width: auto; margin: 0 20px;
Fixed example: width: 960px; margin: auto;

Should that not be changed to read this (with 0 added?

Liquid example: width: auto; margin: 0 20px;
Fixed example: width: 960px; margin: 0 auto;