Fix tiny typo

Author: iblech

src/main/java/com/backblaze/erasure/Galois.java

@@ -97,7 +97,7 @@ public final class Galois {
      * to members of the field.  There is no entry for 255
      * because the highest log is 254.
      *
-     * This table was generated by java_tables.py
+     * This table was generated by java_tables.py.
      */
 
     static final byte [] EXP_TABLE = new byte [] {
@@ -194,7 +194,7 @@ public static byte subtract(byte a, byte b) {
     }
 
     /**
-     * Multiplies to elements of the field.
+     * Multiplies two elements of the field.
      */
     public static byte multiply(byte a, byte b) {
         if (a == 0 || b == 0) {