"fix lrn"

python/paddle/fluid/layers/nn.py

@@ -839,9 +839,9 @@ def linear_chain_crf(input, label, param_attr=None):
         param_attr(ParamAttr): The attribute of the learnable parameter.
 
     Returns:
-        ${log_likelihood_comment}
-        ${transitionexps_comment}
-        ${emissionexps_comment}
+        output(${emission_exps_type}): ${emission_exps_comment} \n
+        output(${transition_exps_type}): ${transition_exps_comment} \n
+        output(${log_likelihood_type}): ${log_likelihood_comment}
 
     """
     helper = LayerHelper('linear_chain_crf', **locals())