def bug(issue=None):
    message = "A known bug."
    if issue is not None:
        message += " See issue #{issue}.".format(issue=issue)
    return message

from urllib.parse import urljoin


def issues_url(organization, repository):
    return urljoin(
        urljoin(
            urljoin("https://github.com", organization),
            repository,
        ),
        "issues",
    )


ISSUES_URL = issues_url("python-jsonschema", "jsonschema")
TEST_SUITE_ISSUES_URL = issues_url("json-schema-org", "JSON-Schema-Test-Suite")


def bug(issue=None):
    message = "A known bug."
    if issue is not None:
        message += f" See {urljoin(ISSUES_URL, str(issue))}."
    return message


def test_suite_bug(issue):
    return (
        "A known test suite bug. "
        f"See {urljoin(TEST_SUITE_ISSUES_URL, str(issue))}."
    )

Improve the internal skipped-test helper messages.
Improve the internal skipped-test helper messages.
