fix: put ; on newline behind edges to enable fast comment-uncomment of edges in generated tikz file

Author: pmbittner

src/main/java/org/variantsync/diffdetective/variation/diff/serialize/TikzExporter.java

@@ -82,8 +82,9 @@ public void exportDiffTree(
                 edge.style().tikzStyle(),
                 edge.to().getID());
         });
-        output.println(";");
-        output.println("");
+        output.println();
+        output.format("%n\t;");
+        output.println();
 
         // Draw node labels. We do this last so that they are on top of edges and nodes.
         format.forEachNode(diffTree, (node) -> {