ci->target_class should be updated as well; #1418
Fix assignment of block as actual value and not expected
Merge pull request #1424 from Bovi-Li/test-assert

Fix assignment of block as actual value and not expected
Fix order of actual and expect test value for ArgumentError
Fix order of actual and expect test value for Array
Merge pull request #1425 from Bovi-Li/test-assert-fix

[mrbtest] Actual/Expect Order - ArgumentError and Array
remove unused inspect_range
add comment for clear_all_old()
revise the comment in mrb_full_gc()

the old comment "clean all the black object as old" looks confusing,
it looks like "transform black object to old object", but indeed black
is old,
Merge pull request #1426 from Fleurer/clear-all-old

add comments for clear_all_old()