test: 'assert any(' has to be partial

Author: nedbat

metacov.ini

@@ -79,6 +79,8 @@ partial_branches =
     # A for-loop that always hits its break statement
     pragma: always breaks
     pragma: part started
+    # If we're asserting that any() is true, it didn't finish.
+    assert any\(
     if env.TESTING:
     if env.METACOV:
     if .* env.JYTHON