Introduce a test for `cp'.
Merge pull request #419 from jaysh/cp-tests

Introduce a test for `cp'.
test: fix -a and -o by using operator precedence
Merge pull request #414 from Arcterus/test-fix

test: fix -a and -o
basic byte and numeric sort
tests for numeric sort
Merge pull request #421 from yincrash/yin_sort_rebased

basic byte and numeric sort rebased and squashed