Why are we testing so many tags in `liberupdatev5` with `endswith` method?

[dchiller]

See, for example, here:

https://github.com/DDMAL/MEI3to5/blob/825c32e0f123067e2b29547a3057c305b36e83fd/liberupdatev5.py#L19C1-L26C67

Why are we using the endswith method rather than checking equality?

[CThierrin]

Sometimes the namespace prefix is added to the element tag. This allows the code to work regardless of whether it's there or not