Fix spec instance~class matchers for Array#compact
Fix spec instance~class matchers for Array.allocate
Fix spec instance~class matchers for Array.[]
Fix spec instance~class matchers for Array#first
Fix spec instance~class matchers for Array#flatten
Fix spec instance~class matchers for Array#flatten!
Fix spec instance~class matchers for Array#hash
Fix spec instance~class matchers for Array#&
Fix spec instance~class matchers for Array#last
Fix spec instance~class matchers for Array#-
Fix spec instance~class matchers for Array.new
Fix spec instance~class matchers for Array#pack
Fix spec instance~class matchers for Array#partition
Fix spec instance~class matchers for Array#permutation
Fix spec instance~class matchers for Array#+
Fix spec instance~class matchers for Array#pop
Fix spec instance~class matchers for Array#reject
Fix spec instance~class matchers for Array#repeated_permutation
Fix spec instance~class matchers for Array#reverse
Fix spec instance~class matchers for Array#rindex