fix python3 error and improve upgrade text


git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/trunk@21867 4ae1f11a-8b86-4847-b8af-ab372f36d1fd
More exception text


git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/trunk@21869 4ae1f11a-8b86-4847-b8af-ab372f36d1fd
6591: converted bytes of media in a string to show in quickview


git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/trunk@21871 4ae1f11a-8b86-4847-b8af-ab372f36d1fd
6590: gramps40 asciidoc.py crashes for at least some reports


git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/trunk@21873 4ae1f11a-8b86-4847-b8af-ab372f36d1fd
formatting cleanup


git-svn-id: svn+ssh://svn.code.sf.net/p/gramps/code/trunk@21875 4ae1f11a-8b86-4847-b8af-ab372f36d1fd