6940: ErrorReportAssistant_Test.test_buffer_recall

reapply from trunk

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/branches/maintenance/gramps34@23171 4ae1f11a-8b86-4847-b8af-ab372f36d1fd
back-port NickH's test fix from gramps40

Apply r22767, w/o the new test.

git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/branches/maintenance/gramps34@23172 4ae1f11a-8b86-4847-b8af-ab372f36d1fd