docs(edges): update edges example code

docs/guides/edge.md

@@ -17,7 +17,7 @@ from diagrams.onprem.analytics import Spark
 from diagrams.onprem.compute import Server
 from diagrams.onprem.database import PostgreSQL
 from diagrams.onprem.inmemory import Redis
-from diagrams.onprem.logging import Fluentd
+from diagrams.onprem.aggregator import Fluentd
 from diagrams.onprem.monitoring import Grafana, Prometheus
 from diagrams.onprem.network import Nginx
 from diagrams.onprem.queue import Kafka
@@ -36,18 +36,34 @@ with Diagram(name="Advanced Web Service with On-Premise (colored)", show=False):
 
     with Cluster("Sessions HA"):
         master = Redis("session")
-        master - Edge(color="brown", style="dashed") - Redis("replica") << Edge(label="collect") << metrics
+        master \
+            - Edge(color="brown", style="dashed") \
+            - Redis("replica") \
+            << Edge(label="collect") \
+            << metrics
         grpcsvc >> Edge(color="brown") >> master
 
     with Cluster("Database HA"):
         master = PostgreSQL("users")
-        master - Edge(color="brown", style="dotted") - PostgreSQL("slave") << Edge(label="collect") << metrics
+        master \
+            - Edge(color="brown", style="dotted") \
+            - PostgreSQL("slave") \
+            << Edge(label="collect") \
+            << metrics
         grpcsvc >> Edge(color="black") >> master
 
     aggregator = Fluentd("logging")
-    aggregator >> Edge(label="parse") >> Kafka("stream") >> Edge(color="black", style="bold") >> Spark("analytics")
+    aggregator \
+        >> Edge(label="parse") \
+        >> Kafka("stream") \
+        >> Edge(color="black", style="bold") \
+        >> Spark("analytics")
 
-    ingress >> Edge(color="darkgreen") << grpcsvc >> Edge(color="darkorange") >> aggregator
+    ingress \
+        >> Edge(color="darkgreen") \
+        << grpcsvc \
+        >> Edge(color="darkorange") \
+        >> aggregator
 ```
 
 ![advanced web service with on-premise diagram colored](/img/advanced_web_service_with_on-premise_colored.png)