Change extension setup() return value to a dictionary of metadata.

This makes it possible to introduce more metadata values later.

1 files changed, 1 insertions, 1 deletions

diff --git a/sphinx/ext/coverage.py b/sphinx/ext/coverage.py
index 49dc02f44..841815e73 100644
--- a/sphinx/ext/coverage.py
+++ b/sphinx/ext/coverage.py
@@ -265,4 +265,4 @@ def setup(app):
     app.add_config_value('coverage_ignore_c_items', {}, False)
     app.add_config_value('coverage_write_headline', True, False)
     app.add_config_value('coverage_skip_undoc_in_source', False, False)
-    return sphinx.__version__
+    return {'version': sphinx.__version__}