Set predicate #{0} -> #{1}

The set `#{0}` is a suboptimal example because the core predicate `zero?` would be even more appropriate.

Author: llasram

README.md

@@ -857,10 +857,10 @@ hints for the pairwise grouping with comments or empty lines.
 
  ```Clojure
  ;; good
- (remove #{0} [0 1 2 3 4 5])
+ (remove #{1} [0 1 2 3 4 5])
 
  ;; bad
- (remove #(= % 0) [0 1 2 3 4 5])
+ (remove #(= % 1) [0 1 2 3 4 5])
 
  ;; good
  (count (filter #{\a \e \i \o \u} "mary had a little lamb"))