* array.c: Fix rdoc for flatten!

* hash.c: Correct rdoc for reject!

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@39442 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

array.c

@@ -4197,8 +4197,8 @@ flatten(VALUE ary, int level, int *modified)
 
 /*
  *  call-seq:
- *     ary.flatten!        -> Array or nil
- *     ary.flatten!(level) -> Array or nil
+ *     ary.flatten!        -> ary or nil
+ *     ary.flatten!(level) -> ary or nil
  *
  *  Flattens +self+ in place.
  *

hash.c

@@ -2697,7 +2697,7 @@ env_each_pair(VALUE ehash)
 
 /*
  * call-seq:
- *   ENV.reject! { |name, value| } -> Hash or nil
+ *   ENV.reject! { |name, value| } -> ENV or nil
  *   ENV.reject!                   -> Enumerator
  *
  * Equivalent to ENV#delete_if but returns +nil+ if no changes were made.