[css-shapes-2][editorial] Fix Bikeshed links

Author: cdoublev

css-shapes-2/Overview.bs

@@ -248,8 +248,8 @@ The ''shape()'' Function</h4>
 
 			This draws a straight line from the command's starting point to its ending point.
 
-		<dt><dfn><<horizontal-line-command>></dfn> = hline [ to [ <length-percentage> | left | center | right | x-start | x-end ]
-															| by <length-percentage> ]
+		<dt><dfn><<horizontal-line-command>></dfn> = hline [ to [ <<length-percentage>> | left | center | right | x-start | x-end ]
+															| by <<length-percentage>> ]
 		<dd>
 			Adds a horizontal
 			<a href="https://www.w3.org/TR/SVG/paths.html#PathDataLinetoCommands">lineto</a> command
@@ -260,7 +260,7 @@ The ''shape()'' Function</h4>
 			Specifying the horizontal component of <<position>> instead of a <<length-percentage>> (''left'', ''center'', ''right'', ''x-start'', or ''x-end''),
 			would draw a line to that <<position>>, with the <<position>>'s vertical component remaining the same as the starting point.
 
-		<dt><dfn><<vertical-line-command>></dfn> = vline [ to [ <length-percentage> | top | center | bottom | y-start | y-end ] | by <length-percentage> ]
+		<dt><dfn><<vertical-line-command>></dfn> = vline [ to [ <<length-percentage>> | top | center | bottom | y-start | y-end ] | by <<length-percentage>> ]
 		<dd>
 			Adds a vertical
 			<a href="https://www.w3.org/TR/SVG/paths.html#PathDataLinetoCommands">lineto</a> command