[exceptions] fix string conversion for Unauthorized exception
changeset 3cb87b61b067 changed CubicWebException to define __unicode__
as the main entry point for string conversion, but left Unauthorized's
__str__ definition unchanged, leading to a mismatch. Closes #10646396.
Document: cubicweb-doc
Title: CubicWeb documentation
Author: Logilab
Abstract: Some base documentation for CubicWeb users and developpers
Section: Apps/Programming
Format: HTML
Index: /usr/share/doc/cubicweb-documentation/html/index.html
Files: /usr/share/doc/cubicweb-documentation/html/*