3.1 fixed example format

Author: Froussios

Part 3 - Taming the sequence/1. Side effects.md

@@ -265,8 +265,8 @@ public class BrakeableService {
 
 Now our reference is safe, but we are still exposing a reference to a `Subject`. Anyone can call `onNext` on our `Subject` and inject values in our sequence. We should only return `Observable<T>`. `Subject`s extend `Observable` and we can cast our subject
 
-```
-public Observable<String> getValues() {
+```java
+public Observable<String> getValuesUnsafe() {
 	return items;
 }
 ```