docs: updates to several patterns

filterer/README.md

@@ -43,7 +43,9 @@ public interface Threat {
     int id();
     ThreatType type();
 }
+```
 
+```java
 public interface ThreatAwareSystem {
     String systemId();
     List<? extends Threat> threats();
@@ -222,10 +224,6 @@ Running the example produces the following console output.
 08:33:23.581 [main] INFO com.iluwatar.filterer.App -- Filtered by probability = 0.99 : SimpleProbabilisticThreatAwareSystem(systemId=Sys-1, threats=[SimpleProbableThreat{probability=0.99} SimpleThreat(threatType=TROJAN, id=1, name=Trojan-ArcBomb)])
 ```
 
-## Class diagram
-
-![Filterer](./etc/filterer.png "Filterer")
-
 ## Applicability
 
 * Use when you need to filter a collection of objects dynamically based on different criteria.