Regexp.union encoding support and compatibility fixes
Add Error messages for ArgumentErrors
Untag passing specs
Write Kernel#inspect specs
Add Hash#to_a specs for taint/untrust
Fix Hash#to_a for taint/untrust
Add Hash#{to_s,inspect} specs for taint/untrust
Fix Hash#{to_s,inspect} for taint/untrust
Add Enumerable#group_by specs for taint/untrust
Fix Enumerable#group_by for taint/untrust
Add Enumerable#{to_a,entries} specs for taint/untrust
Fix Enumerable#{to_a,entries} for taint/untrust
Fix a Range#to_s spec
Add Range#to_s specs for taint/untrust
Add Range#inspect specs for taint/untrust
Add Module#extend_object specs for taint/untrust
Add Module#append_features specs for taint/untrust
Fix Module#append_features for taint/untrust
Add Module#prepend_features specs for taint/untrust
Fix Module#prepend_features for taint/untrust