TensorShape.swift file updated to improve TensorShape printing

[ksasi]

Added description property to TensorShape by conforming to CustomStringConvertible so that we can obtain the desired TensorShape printing.

Resolves TF-447.

[dan-zheng]

Could you please add a test to test/TensorFlowRuntime/tensor.swift?

Something like:

TensorTests.testAllBackends("TensorShapeDescription") {
  expectEqual("TensorShape([2, 2])", Tensor<Int32>(ones: [2, 2]).shape.description)
  expectEqual("TensorShape([])", Tensor(1).shape.description)
}

[dan-zheng]

Please fix indentation:

Suggested change

	}
	}

[dan-zheng]

A thought: how about using just [2, 2] instead of TensorShape([2, 2])?
cc @rxwei

[rxwei]

I agree that just [2, 2] is better.

[rxwei]

There's no need for @inlinable here.

[rxwei]

Since we think that [2, 2] is more ideal, calling dimensions.description should be sufficient.

Suggested change

	return "TensorShape(\(dimensions))"
	return dimensions.description

[rxwei]

@swift-ci please test tensorflow

[rxwei]

@swift-ci please test tensorflow

[ksasi]

Updated changes as suggested i.e.
1.Fixed indentation
2.Removed @inlinable
3.Updated "TensorShape((dimensions))" to dimensions.description

Also added test to test/TensorFlowRuntime/tensor.swift as below:

TensorTests.testAllBackends("TensorShapeDescription") {
  expectEqual("[2, 2]", Tensor<Int32>(ones: [2, 2]).shape.description)
  expectEqual("[]", Tensor(1).shape.description)
}

[rxwei]

Thanks!

[dan-zheng]

Thank you!