According to context,the size should be 16 rather than 64

src/dict.c

@@ -695,7 +695,7 @@ static unsigned long rev(unsigned long v) {
  * (where SIZE-1 is always the mask that is equivalent to taking the rest
  *  of the division between the Hash of the key and SIZE).
  *
- * For example if the current hash table size is 64, the mask is
+ * For example if the current hash table size is 16, the mask is
  * (in binary) 1111. The position of a key in the hash table will be always
  * the last four bits of the hash output, and so forth.
  *