bundle2: fix type of experimental option

mercurial/repair.py

@@ -13,7 +13,7 b' import errno'
 
 def _bundle(repo, bases, heads, node, suffix, compress=True):
     """create a bundle with the specified revisions as a backup"""
-    usebundle2 = (repo.ui.config('experimental', 'bundle2-exp', True) and
+    usebundle2 = (repo.ui.configbool('experimental', 'bundle2-exp', True) and
                   repo.ui.config('experimental', 'strip-bundle2-version'))
     if usebundle2:
         cgversion = repo.ui.config('experimental', 'strip-bundle2-version')