[BUGFIX][DOC] docs.typo3.org fails to render some inline roles

When inline roles are found at the beginning of a continued line
of the body of a directive, docs.typo3.org fails to render them
(although it is valid Sphinx markup and works with a local rendering).

Change-Id: I3f9c0b5d2706322ba188289247ea9605603fe740
Reviewed-on: https://review.typo3.org/24632
Reviewed-by: Xavier Perseguers
Tested-by: Xavier Perseguers