Log Message:
Update to 3.20180311. From the changelog:

  [ Amitai Schleier ]
  * Avoid unexpected full paths from find(1)

  [ thm.id.fedoraproject.org ]
  * rst test: Probe for docutils Python 3 module, not Python 2

  [ Simon McVittie ]
  * mdwn: Automatically detect which Discount flags to use, fixing
    regressions in 3.20180228 when using Discount < 2.2
  * Add a test asserting that no plugin is an empty file, to confirm
    that the build fixes in 3.20180228 were successful