Turtle serializer auto-generates prefixes for predicates containing the base URI

[bulricht]

from rdflib import Graph, Namespace, URIRef

mns = Namespace("http://my-namespace.net/")
g = Graph(base="http://my-base.net/")
g.add((mns.foo, URIRef("http://my-base.net/my-predicate"), mns.bar))

print(g.serialize(format="text/turtle"))

Prints the following (with redundant ns1 prefix):

@base <http://my-base.net/> .
@prefix ns1: <http://my-base.net/> .

<http://my-namespace.net/foo> <my-predicate> <http://my-namespace.net/bar> .

While the expected output is:

@base <http://my-base.net/> .

<http://my-namespace.net/foo> <my-predicate> <http://my-namespace.net/bar> .

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• PR skip prefix generation for predicates corresponding to base namespace #3238
• This issue may be related to issue Turtle serializer outputs undeclared prefix with same domain base #3160.