error in comment fixed

src/t_zset.c

@@ -17,7 +17,7 @@
 /* This skiplist implementation is almost a C translation of the original
  * algorithm described by William Pugh in "Skip Lists: A Probabilistic
  * Alternative to Balanced Trees", modified in three ways:
- * a) this implementation allows for repeated values.
+ * a) this implementation allows for repeated scores.
  * b) the comparison is not just by key (our 'score') but by satellite data.
  * c) there is a back pointer, so it's a doubly linked list with the back
  * pointers being only at "level 1". This allows to traverse the list