fix lint and bump nightly version

.travis.yml

@@ -25,9 +25,9 @@ matrix:
     env: TF_VERSION=1.0.1 TF_TYPE=nightly
   - os: linux
     python: 3.5
-    env: TF_VERSION=1.0.1 TF_TYPE=nightly
+    env: TF_VERSION=1.head TF_TYPE=nightly
   allow_failures:
-  - env: TF_VERSION=1.0.1 TF_TYPE=nightly
+  - env: TF_VERSION=1.head TF_TYPE=nightly
 
 install:
 - pip install -U pip    # the pip version on travis is too old

examples/Char-RNN/char-rnn.py

@@ -74,7 +74,7 @@ class Model(ModelDesc):
         input, nextinput = inputs
 
         cell = rnn.MultiRNNCell([rnn.BasicLSTMCell(num_units=param.rnn_size)
-            for _ in range(param.num_rnn_layer)])
+                                for _ in range(param.num_rnn_layer)])
 
         def get_v(n):
             ret = tf.get_variable(n + '_unused', [param.batch_size, param.rnn_size],