Fix doc warnings

Author: nicolasvasilache

docs/source/framework/pytorch_integration/autotuning_layers.rst

@@ -92,7 +92,7 @@ kernel timing. You can adopt the following parameter settings as starters for au
 
 
 Initial CudaMappingOptions
------------------------
+--------------------------
 
 At the beginning of autotuning, the kernel is mapped to whatever :code:`mapping options`
 user passes. If no mapping options are passed by user, then the default :code:`naive`

docs/source/framework/pytorch_integration/writing_layers.rst

@@ -46,7 +46,7 @@ tc.define
 .. _must_pass_options:
 
 Specifying CudaMappingOptions
---------------------------
+-----------------------------
 
 TC is transformed into :code:`CUDA` kernel by using the :code:`Options` which
 is used to run the layer and hence also determines the performance of the kernel