https://access.redhat.com/errata/RHSA-2019:1456
https://blog.getbootstrap.com/2018/12/13/bootstrap-3-4-0/
https://github.com/twbs/bootstrap/issues/27044
https://github.com/twbs/bootstrap/issues/27915#issuecomment-452140906
https://github.com/twbs/bootstrap/issues/27915#issuecomment-452196628
https://github.com/twbs/bootstrap/pull/27047
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