Fix nits from comments.

theano/sandbox/gpuarray/dnn.py

@@ -1258,7 +1258,7 @@ def local_abstractconv_cudnn(node):
                              conv_mode=conv_mode)
     return [rval]
 
-conv_groupopt.register(local_abstactconv_cudnn)
+conv_groupopt.register(local_abstractconv_cudnn)
 
 
 @inplace_allocempty(GpuDnnConv, 2)

theano/sandbox/gpuarray/opt.py

@@ -787,7 +787,7 @@ def local_error_convop(node, context_name):
 ConvOp does not work with the gpuarray backend.
 
 Use the new convolution interface to have GPU convolution working:
-theano.tensor.nnet.abstract_conv2d.conv2d()
+theano.tensor.nnet.conv2d()
 """
 
 # This deals with any abstract convs that have a transfer somewhere