[SPARK-9980] [BUILD] Fix SBT publishLocal error due to invalid characters in doc

Tiny modification to a few comments ```sbt publishLocal``` work again.

Author: Herman van Hovell <hvanhovell@questtec.nl>

Closes #8209 from hvanhovell/SPARK-9980.

1 files changed, 3 insertions, 3 deletions

diff --git a/core/src/main/java/org/apache/spark/unsafe/map/BytesToBytesMap.java b/core/src/main/java/org/apache/spark/unsafe/map/BytesToBytesMap.java
index 5f3a4fcf4d..b24eed3952 100644
--- a/core/src/main/java/org/apache/spark/unsafe/map/BytesToBytesMap.java
+++ b/core/src/main/java/org/apache/spark/unsafe/map/BytesToBytesMap.java
@@ -92,9 +92,9 @@ public final class BytesToBytesMap {
 
   /**
    * The maximum number of keys that BytesToBytesMap supports. The hash table has to be
-   * power-of-2-sized and its backing Java array can contain at most (1 << 30) elements, since
-   * that's the largest power-of-2 that's less than Integer.MAX_VALUE. We need two long array
-   * entries per key, giving us a maximum capacity of (1 << 29).
+   * power-of-2-sized and its backing Java array can contain at most (1 &lt;&lt; 30) elements,
+   * since that's the largest power-of-2 that's less than Integer.MAX_VALUE. We need two long array
+   * entries per key, giving us a maximum capacity of (1 &lt;&lt; 29).
    */
   @VisibleForTesting
   static final int MAX_CAPACITY = (1 << 29);