Fix building of the docs for non-final versions.

Author: Michael Howitz

CHANGES.rst

@@ -5,7 +5,7 @@
 6.1 (unreleased)
 ================
 
-- Nothing changed yet.
+- Fix building of the docs for non-final versions.
 
 
 6.1a1 (2023-04-06)

docs/conf.py

@@ -56,14 +56,14 @@
 
 # General information about the project.
 project = 'zope.interface'
-copyright = '2012-2017, Zope Foundation contributors'
+copyright = '2012-2023, Zope Foundation contributors'
 
 # The version info for the project you're documenting, acts as replacement for
 # |version| and |release|, also used in various other places throughout the
 # built documents.
 #
 # The short X.Y version.
-version = '%s.%s' % tuple(map(int, rqmt.version.split('.')[:2]))
+version = '%s.%s' % tuple(rqmt.version.split('.')[:2])
 # The full version, including alpha/beta/rc tags.
 release = rqmt.version