update docs

mhcflurry/allele_encoding.py

@@ -10,7 +10,7 @@ class AlleleEncoding(object):
             alleles,
             allele_to_fixed_length_sequence=None):
         """
-        A place to cache encoding for a (potentially large) sequence of alleles.
+        A place to cache encodings for a (potentially large) sequence of alleles.
 
         Parameters
         ----------

mhcflurry/class1_affinity_predictor.py

@@ -414,6 +414,9 @@ class Class1AffinityPredictor(object):
             Number of neural networks to fit
         
         architecture_hyperparameters_list : list of dict
+            List of hyperparameters. If more than one set of hyperparameters
+            are specified, model selection over them is performed and model
+            with the lowest validation loss is selected for each fold.
                
         allele : string