Created by: vsn4ik
#23477 Created - 16 Aug 2017. Merged - 20 Aug 2017: https://github.com/twbs/bootstrap/blob/6cdcfe6b33470a262f58978bcf2754126c366c23/scss/_card.scss#L65-L67
#23022 Created - 9 Jul 2017. Merged - 26 Sep 2017: https://github.com/twbs/bootstrap/blob/6cdcfe6b33470a262f58978bcf2754126c366c23/scss/_card.scss#L85-L88
Two PRs fixed the same problem.