minor cleanup in system_hook_spec
minor cleanup in system_hook_spec

htve/GitlabForChinese,dplarson/gitlabhq,screenpages/gitlabhq,iiet/iiet-git,dwrensha/gitlabhq,SVArago/gitlabhq,screenpages/gitlabhq,stoplightio/gitlabhq,Soullivaneuh/gitlabhq,darkrasid/gitlabhq,dplarson/gitlabhq,larryli/gitlabhq,axilleas/gitlabhq,icedwater/gitlabhq,allysonbarros/gitlabhq,larryli/gitlabhq,mr-dxdy/gitlabhq,openwide-java/gitlabhq,SVArago/gitlabhq,dplarson/gitlabhq,mr-dxdy/gitlabhq,t-zuehlsdorff/gitlabhq,SVArago/gitlabhq,shinexiao/gitlabhq,martijnvermaat/gitlabhq,LUMC/gitlabhq,dreampet/gitlab,mmkassem/gitlabhq,Soullivaneuh/gitlabhq,axilleas/gitlabhq,shinexiao/gitlabhq,larryli/gitlabhq,htve/GitlabForChinese,mmkassem/gitlabhq,daiyu/gitlab-zh,allysonbarros/gitlabhq,allysonbarros/gitlabhq,LUMC/gitlabhq,htve/GitlabForChinese,jirutka/gitlabhq,mmkassem/gitlabhq,dwrensha/gitlabhq,t-zuehlsdorff/gitlabhq,daiyu/gitlab-zh,LUMC/gitlabhq,icedwater/gitlabhq,dwrensha/gitlabhq,icedwater/gitlabhq,dwrensha/gitlabhq,dplarson/gitlabhq,LUMC/gitlabhq,iiet/iiet-git,dreampet/gitlab,dreampet/gitlab,daiyu/gitlab-zh,t-zuehlsdorff/gitlabhq,martijnvermaat/gitlabhq,Soullivaneuh/gitlabhq,openwide-java/gitlabhq,daiyu/gitlab-zh,screenpages/gitlabhq,screenpages/gitlabhq,stoplightio/gitlabhq,Soullivaneuh/gitlabhq,martijnvermaat/gitlabhq,jirutka/gitlabhq,stoplightio/gitlabhq,iiet/iiet-git,darkrasid/gitlabhq,mmkassem/gitlabhq,mr-dxdy/gitlabhq,stoplightio/gitlabhq,openwide-java/gitlabhq,SVArago/gitlabhq,shinexiao/gitlabhq,shinexiao/gitlabhq,allysonbarros/gitlabhq,darkrasid/gitlabhq,jirutka/gitlabhq,openwide-java/gitlabhq,martijnvermaat/gitlabhq,darkrasid/gitlabhq,iiet/iiet-git,htve/GitlabForChinese,dreampet/gitlab,mr-dxdy/gitlabhq,jirutka/gitlabhq,t-zuehlsdorff/gitlabhq,axilleas/gitlabhq,axilleas/gitlabhq,icedwater/gitlabhq,larryli/gitlabhq