Minor change

Author: tdas

docs/streaming-custom-receivers.md

@@ -16,6 +16,7 @@ This starts with implementing a **Receiver**
 ([Scala doc](api/scala/index.html#org.apache.spark.streaming.receiver.Receiver),
 [Java doc](api/java/org/apache/spark/streaming/receiver/Receiver.html)).
 A custom receiver must extend this abstract class by implementing two methods
+
 - `onStart()`: Things to do to start receiving data.
 - `onStop()`: Things to do to stop receiving data.
 

docs/streaming-programming-guide.md

@@ -762,7 +762,7 @@ that no data gets lost due to any kind of failure. This leads to two kinds of re
   for reliable sources, one may implement an unreliable receiver that do not go into the complexity
   of acknowledging correctly.
 
-The details of how to write a reliable receiver is discussed in the
+The details of how to write a reliable receiver are discussed in the
 [Custom Receiver Guide](streaming-custom-receivers.html).
 
 ***