[css-multicol-2] Editorial improvement

Author: frivoal

css-multicol-2/Overview.bs

@@ -180,10 +180,10 @@ Spanning columns</h2>
 			The number of columns spanned by the element
 			depends on its <a>min-content</a> <a>outer size</a>
 			in the inline direction of the <a>multi-column element</a>.
-			If it is smaller than the column width,
+			If it is smaller than the used value of 'column-width',
 			this is the same as if ''column-span: none'' had been specified.
 			Otherwise, the number of columns spanned is the smallest positive integer <var>n</var>
-			for which <code><var>n</var> × <var>column width</var> + (<var>n</var> - 1) × <var>column gap</var></code>
+			for which <code><var>n</var> × <var>'column-width'</var> + (<var>n</var> - 1) × <var>'column-gap'</var></code>
 			is larger than the <a>min-content</a> <a>outer size</a>.
 			If this would be larger than the number of columns,
 			the number of columns spanned will be the same as if ''column-span: all'' had been specified.