Apply suggestions from code review

Co-authored-by: Alois Klink <alois@aloisklink.com>

packages/mermaid/src/dagre-wrapper/edges.js

@@ -456,6 +456,8 @@ export const insertEdge = function (elem, e, edge, clusterDb, diagramType, graph
     curve = edge.curve;
   }
 
+  // We need to draw the lines a bit shorter to avoid drawing
+  // under any transparent markers.
   // The offsets are calculated from the markers' dimensions.
   const markerOffsets = {
     aggregation: 18,

packages/mermaid/src/dagre-wrapper/markers.js

@@ -136,6 +136,7 @@ const lollipop = (elem, type) => {
     .attr('cx', 7)
     .attr('cy', 7)
     .attr('r', 6);
+
   elem
     .append('defs')
     .append('marker')