spurious stroke on catchment rect

Author: Fil

src/marks/lasso.js

@@ -41,6 +41,7 @@ export class Lasso extends Mark {
         .attr("y", marginTop)
         .attr("width", width - marginLeft - marginRight)
         .attr("height", height - marginTop - marginBottom)
+        .attr("stroke", "none")
         .attr("fill", "none")
         .attr("cursor", "cross") // TODO
         .attr("pointer-events", "all")

test/output/penguinCulmenLasso.html

@@ -432,7 +432,7 @@
           <circle cx="32.58333333333335" cy="155.67272727272726" r="3"></circle>
         </g>
         <g aria-label="lasso" fill="green" fill-opacity="0.3" stroke="#666" stroke-width="2">
-          <rect x="0" y="30" width="161" height="240" fill="none" cursor="cross" pointer-events="all" fill-rule="evenodd"></rect>
+          <rect x="0" y="30" width="161" height="240" stroke="none" fill="none" cursor="cross" pointer-events="all" fill-rule="evenodd"></rect>
         </g>
       </g>
       <g transform="translate(219,0)">
@@ -784,7 +784,7 @@
           <circle cx="57.50000000000003" cy="114.65454545454547" r="3"></circle>
         </g>
         <g aria-label="lasso" fill="green" fill-opacity="0.3" stroke="#666" stroke-width="2">
-          <rect x="0" y="30" width="161" height="240" fill="none" cursor="cross" pointer-events="all" fill-rule="evenodd"></rect>
+          <rect x="0" y="30" width="161" height="240" stroke="none" fill="none" cursor="cross" pointer-events="all" fill-rule="evenodd"></rect>
         </g>
       </g>
       <g transform="translate(398,0)">
@@ -1136,7 +1136,7 @@
           <circle cx="49.83333333333333" cy="161.78181818181818" r="3"></circle>
         </g>
         <g aria-label="lasso" fill="green" fill-opacity="0.3" stroke="#666" stroke-width="2">
-          <rect x="0" y="30" width="161" height="240" fill="none" cursor="cross" pointer-events="all" fill-rule="evenodd"></rect>
+          <rect x="0" y="30" width="161" height="240" stroke="none" fill="none" cursor="cross" pointer-events="all" fill-rule="evenodd"></rect>
         </g>
       </g>
     </g>