javadoc fixes

Author: Lee Rhodes

src/main/java/com/yahoo/sketches/frequencies/FrequentItemsSketch.java

@@ -70,9 +70,9 @@
  * <p><b>Maximum Capacity of the Sketch</b></p>
  * 
  * <p>The LOAD_FACTOR for the hash map is internally set at 75%, 
- * which means at any time the map capacity of (item, count) pairs is <i>mapCap</i> = 0.75 X 
+ * which means at any time the map capacity of (item, count) pairs is <i>mapCap</i> = 0.75 * 
  * <i>mapSize</i>.
- * The maximum capacity of (item, count) pairs of the sketch is <i>maxMapCap</i> = 0.75 X 
+ * The maximum capacity of (item, count) pairs of the sketch is <i>maxMapCap</i> = 0.75 * 
  * <i>maxMapSize</i>.
  * Papers that describe the mathematical error properties of this type of algorithm often 
  * refer to sketch capacity with the symbol <i>k</i>.</p>

src/main/java/com/yahoo/sketches/frequencies/FrequentLongsSketch.java

@@ -68,7 +68,7 @@
  * 
  * <p>The LOAD_FACTOR for the hash map is internally set at 75%, 
  * which means at any time the map capacity of (item, count) pairs is <i>mapCap</i> = 
- * 0.75 * <i><mapSize</i>.
+ * 0.75 * <i>mapSize</i>.
  * The maximum capacity of (item, count) pairs of the sketch is <i>maxMapCap</i> = 
  * 0.75 * <i>maxMapSize</i>.
  * Papers that describe the mathematical error properties of this type of algorithm often