tests: redirect stdout to fix mess from ANSI escapes
tests: redirect stdout to fix mess from ANSI escapes

Fixes https://github.com/junegunn/vader.vim/issues/90.
Closes https://github.com/neomake/neomake/pull/678.

bonds/neomake,neomake/neomake,nerdrew/neomake,codeinabox/neomake,neomake/neomake,bonds/neomake,euclio/neomake,nerdrew/neomake,datanoise/neomake,euclio/neomake