Wrong format specifier used when formatting exception message.

eloj · eloj · commit 93295772b7d1 · 2014-01-09T11:03:12.000+01:00
diff --git a/sklearn/cross_validation.py b/sklearn/cross_validation.py
@@ -243,7 +243,7 @@ def __init__(self, n, n_folds, indices):
             raise ValueError(
                 "k-fold cross validation requires at least one"
                 " train / test split by setting n_folds=2 or more,"
-                " got n_folds=%d.".format(n_folds))
+                " got n_folds={0}.".format(n_folds))
         if n_folds > self.n:
             raise ValueError(
                 ("Cannot have number of folds n_folds={0} greater"
