Update docstring of blank_index in ctc_greedy_decoder
diff --git a/tensorflow/python/ops/ctc_ops.py b/tensorflow/python/ops/ctc_ops.py
index 41fb56f..1b5e6a1 100644
--- a/tensorflow/python/ops/ctc_ops.py
+++ b/tensorflow/python/ops/ctc_ops.py
@@ -314,10 +314,10 @@
sequence_length: 1-D `int32` vector containing sequence lengths, having size
`[batch_size]`.
merge_repeated: Boolean. Default: True.
- blank_index: (Optional). Default: -1. The class index to use for the blank
- label. Negative values will start from num_classes, ie, -1 will reproduce
- the ctc_greedy_decoder behavior of using num_classes - 1 for the blank
- symbol, which, actually, corresponds to the default.
+ blank_index: (Optional). Default: num_classes - 1. Define the class index to
+ use for the blank label. Negative values will start from num_classes,
+ ie, -1 will reproduce the ctc_greedy_decoder behavior of using
+ num_classes - 1 for the blank symbol, which corresponds to the default.
Returns:
A tuple `(decoded, neg_sum_logits)` where
