Added edge labels

test/web_style.html

@@ -115,8 +115,8 @@
         cyr[Class node-cyr<br />defined by classDef];
         od2>Class node-odd-override<br />defined in page CSS<br />and defined by classDef];
         ncdef[classDef style];
-        od2-->ncdef;
-        cyr-->ncdef;
+        od2-->|Simple edge label|ncdef;
+        cyr-->|Complex<br>multiline<br>edge label|ncdef;
         class cyr node-cyr;
         class od2 node-odd-override;
         classDef node-odd-override fill:#BB00BB,stroke:#666622;