Correct documentation for `data_attribute` method
Correct documentation for `data_attribute` method

Also break up a long line, just 'cause.

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