Update signal.py

Signed-off-by: xavier dupré <[email protected]>

Author: sdpython

tf2onnx/onnx_opset/signal.py

@@ -101,7 +101,10 @@ def DFT_real(x, fft_length=None):
         """
         consumers = ctx.find_output_consumers(node.output[0])
         consumer_types = set(op.type for op in consumers)
-        utils.make_sure(consumer_types == {'ComplexAbs'}, "Current implementation of RFFT only allows ComplexAbs as consumer not %r", consumer_types)
+        utils.make_sure(
+            consumer_types == {'ComplexAbs'},
+            "Current implementation of RFFT only allows ComplexAbs as consumer not %r",
+            consumer_types)
 
         onnx_dtype = ctx.get_dtype(node.input[0])
         shape = ctx.get_shape(node.input[0])