[css-shapes-2][editorial] Fix markup

Author: tabatkins

css-shapes-2/Overview.bs

@@ -149,7 +149,7 @@ The ''shape()'' Function</h4>
 	identical to that of an <a href="https://www.w3.org/TR/SVG11/paths.html#PathData">SVG Path</a>,
 	which the function represents.
 
-	The ''from <<coordinate-pair>>'' represents the starting point for the first shape-command.
+	The <css>from <<coordinate-pair>></css> represents the starting point for the first shape-command.
 	It adds an initial <a href="https://www.w3.org/TR/SVG/paths.html#PathDataMovetoCommands">absolute moveto</a>
 	to the list of path data commands,
 	with the <<coordinate-pair>> measured from the top-left corner of the [=reference box=].