Add line breaks at the end of network setup rules to avoid unintended merging with a subsequent line.

props socki03.
fixes #29945.
Built from https://develop.svn.wordpress.org/trunk@29899


git-svn-id: http://core.svn.wordpress.org/trunk@29654 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Twenty Fifteen: Update some more bundled theme references after [29895].

see #29799.
Built from https://develop.svn.wordpress.org/trunk@29900


git-svn-id: http://core.svn.wordpress.org/trunk@29655 1a063a9b-81f0-0310-95a4-ce76da25c4cd