Improve WikiPage.group_by_directory
Improve WikiPage.group_by_directory

darkrasid/gitlabhq,darkrasid/gitlabhq,dreampet/gitlab,dplarson/gitlabhq,axilleas/gitlabhq,iiet/iiet-git,iiet/iiet-git,t-zuehlsdorff/gitlabhq,t-zuehlsdorff/gitlabhq,LUMC/gitlabhq,t-zuehlsdorff/gitlabhq,axilleas/gitlabhq,LUMC/gitlabhq,stoplightio/gitlabhq,htve/GitlabForChinese,htve/GitlabForChinese,LUMC/gitlabhq,darkrasid/gitlabhq,mmkassem/gitlabhq,stoplightio/gitlabhq,jirutka/gitlabhq,htve/GitlabForChinese,dplarson/gitlabhq,jirutka/gitlabhq,mmkassem/gitlabhq,dplarson/gitlabhq,dreampet/gitlab,mmkassem/gitlabhq,jirutka/gitlabhq,iiet/iiet-git,LUMC/gitlabhq,htve/GitlabForChinese,dplarson/gitlabhq,darkrasid/gitlabhq,axilleas/gitlabhq,mmkassem/gitlabhq,dreampet/gitlab,stoplightio/gitlabhq,jirutka/gitlabhq,dreampet/gitlab,stoplightio/gitlabhq,t-zuehlsdorff/gitlabhq,axilleas/gitlabhq,iiet/iiet-git