Update MR doc to indicate that the linear-history feature is available for CE as well
Update MR doc to indicate that the linear-history feature is available for CE as well

axilleas/gitlabhq,axilleas/gitlabhq,mmkassem/gitlabhq,axilleas/gitlabhq,dreampet/gitlab,stoplightio/gitlabhq,mmkassem/gitlabhq,stoplightio/gitlabhq,dreampet/gitlab,jirutka/gitlabhq,iiet/iiet-git,stoplightio/gitlabhq,axilleas/gitlabhq,dreampet/gitlab,jirutka/gitlabhq,iiet/iiet-git,mmkassem/gitlabhq,jirutka/gitlabhq,iiet/iiet-git,mmkassem/gitlabhq,jirutka/gitlabhq,dreampet/gitlab,iiet/iiet-git,stoplightio/gitlabhq