Fix for markdown files (#618)
Fix for markdown files (#618)

We shouldn't trim trailing whitespace in markdown files.
AlmirKadric/hyperterm,zeit/hyper,martinvd/hyper,MartyGentillon/hyper,whitelynx/hyperterm,ekmartin/hyperterm,spncrgr/hyper,KunalKene1797/hyper,wilsontayar/hyper,ppot/hyper,ppot/hyper,reslaurentii/hyper,rickycodes/hyper,zeit/hyperterm,derrickpelletier/hyper,AlmirKadric/hyperterm,wilsontayar/hyper,stefanivic/hyper,zeit/hyperterm,chabou/hyper,spncrgr/hyper,ekmartin/hyperterm,stefanivic/hyper,reslaurentii/hyper,martinvd/hyper,rickycodes/hyper,whitelynx/hyperterm,zeit/hyper,ppot/hyper,derrickpelletier/hyper,zeit/hyper,zeit/hyper,chabou/hyper,chabou/hyper,MartyGentillon/hyper,KunalKene1797/hyper