Revert "Fix detection of the "command" command line argument. Fixes #351."
Revert "Fix detection of the "command" command line argument. Fixes #351."

This reverts commit cab8ca525327f22ae21759781611ff8b2b0c83ab.

grogancolin/dub,nazriel/dub,gedaiu/dub,p0nce/dub,dreamsxin/dub,alexeibs/dub,Abscissa/dub-data-mod,jeanbaptistelab/dub,schuetzm/dub,Flamaros/dub,jelmansouri/dub,rjframe/dub,y12uc231/dub,Abscissa/dub,xentec/dub,D-Programming-Language/dub,Geod24/dub