Rewrite of grid-area values #337

Using this sample code
https://developer.mozilla.org/en-US/docs/Web/CSS/grid-template-areas#Example

Actual behaviour

Axis does rename the grid-area: nav; to navigation which does break everything.

#page > nav {
 grid-area: nav;
 background-color: #ffa08c;
}

Expected behaviour

It should not touch the name of the grid-area