See Bug-Debian https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=811583 ModemManager fails to build with GCC 6 due to indentation issues. While at it, I fixed a few related whitespace issues.
Created attachment 121752 [details] [review] [PATCH] tests: white space / indentation fixes
Thanks, pushed to git master and mm-1-4.
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