DOC Improve description of decision_function_shape in SVC
@@ -504,7 +504,8 @@ class SVC(BaseSVC):
Whether to return a one-vs-rest ('ovr') decision function of shape
(n_samples, n_classes) as all other classifiers, or the original
one-vs-one ('ovo') decision function of libsvm which has shape
- (n_samples, n_classes * (n_classes - 1) / 2).
+ (n_samples, n_classes * (n_classes - 1) / 2). However, one-vs-one
+ ('ovo') is used as multi-class strategy.
.. versionchanged:: 0.19
decision_function_shape is 'ovr' by default.
