create compare module
refactor sorter method
fix sorting
moving <=> to Object
minmaxes
remote tags
fix
Array#index
Test `a::b = nil` assignments, which are currently not supported
# block versions
# remove array copied methods
# remove reserse_each_with_index
moving method to objspace
# not need to check block
fix
fix
Updated test and implemented.
Merge branch 'pr/560'
Fixed #561 -- don't try to load both a directory if there's a path with that name
fix up the require tags