https://github.com/apache/spark/blob/a60c36458d6335e6787edd4d13635227e86927f3/dev/create-release/releaseutils.py#L150-L165
# Maintain a mapping for translating issue types to contributions in the release notes
# This serves an additional function of warning the user against unknown issue types
# Note: This list is partially derived from this link:
# https://issues.apache.org/jira/plugins/servlet/project-config/SPARK/issuetypes
# Keep these in lower case
known_issue_types = {
"bug": "bug fixes",
"build": "build fixes",
"dependency upgrade": "build fixes",
"improvement": "improvements",
"new feature": "new features",
"documentation": "documentation",
"test": "test",
"task": "improvement",
"sub-task": "improvement"
}
