add support for `immutable=True/False` parameter in `.canonical_label()` and other functions that create a new graph

[maxale]

Problem Description

Since Graph().canonical_label(immutable=True) gives

TypeError: GenericGraph.canonical_label() got an unexpected keyword argument 'immutable'

one is forced to use an additional .copy() call like Graph().canonical_label().copy(immutable=True) to get an immutable canonical label of a given graph.

Proposed Solution

It will be more straightforward to have immutable= keyword argument supported by any function that creates and returns a new graph (like .canonical_copy()) to save on an extra call to .copy(immutable=True) when the returned graph is needed to be immutable.

Alternatives Considered

N/A

Additional Information

No response

Is there an existing issue for this?

• I have searched the existing issues for a bug report that matches the one I want to file, without success.