While we might never be able to have 100% of our code strict, we can at
the very least do it for all of our tests. This ensures that our tests
are using our API with the types as intended by the test author, and not
silently be cast to what our API requires.
Fix#3565. Requester suggested adding viewport as a property of Html Writer. I think it would fit better as a Document Property, so that it can be both read and written, just like other meta properties, making it easier to load an Html spreadsheet and save it as a new one preserving this property. It is an open question whether we should try to preserve this property when writing to other spreadsheet types, e.g. as a custom property for Xlsx. For now, I am not attempting that. Requester also suggested this as a boolean property, but there are other parameters and different values that might be used for viewport. So I am defining it as a string property, with a constant SUGGESTED_VIEWPORT that can be used for requester's use case.
Adrien Crivelli
oleibman