Fix `Enumerable#filter_map` without block; ref
MODIFY
mrbgems/mruby-enum-ext/mrblib/enum.rb
mrbgems/mruby-enum-ext/mrblib/enum.rb
@@ -828,7 +828,7 @@ module Enumerable
end
def filter_map(&blk)
- return to_enum(:find_index, val) unless blk
+ return to_enum(:filter_map) unless blk
ary = []
self.each do |x|

Fix `Enumerable#filter_map` without block; ref d380c7d2