Change %s to .format
@@ -49,7 +49,7 @@ class SourceDistribution(AbstractDistribution):
requirement=self.req,
conflicting_with=conflicting_with,
description=', '.join(
- '%s is incompatible with %s' % (installed, wanted)
+ '{} is incompatible with {}'.format(installed, wanted)
for installed, wanted in sorted(conflicting)
)
)
