Require alignment of grid area names

[firefoxic]

Multi-line grid-templat-areas values:

.selector {
	grid-template-areas:
		"a a"
		"foo foo"
		"long-one long-one";
}

should be formatted with area names and closing quotes aligned:

.selector {
	grid-template-areas:
		"a         a       "
		"foo       foo     "
		"long-one  long-one";
}