In 'svn propget', forbid using 'show-inherited-properties' with 'strict'.

The reason is because 'strict' (that is, print no newline afterwards) is
only really useful when there is no more than one value to output. This is
consistent with how we already forbid it when there are multiple targets or
a depth other than 'empty'.

See email thread "--strict vs --no-newline", started on 2014-06-09 by Julian
Foad, archived at e.g. <http://svn.haxx.se/dev/archive-2014-06/0023.shtml>.

* subversion/svn/propget-cmd.c
  (svn_cl__propget): Forbid 'strict' with 'show-inherited-properties'.

* subversion/svn/svn.c
  (svn_cl__cmd_table): Update the help text accordingly.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1611698 13f79535-47bb-0310-9956-ffa450edef68