Fix typo in documentation: ouput -> output.
Fix typo in documentation: ouput -> output.

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