mypy

Fix bug notifier for issues with no body text (#145603) #19821

Job	Run time
Run mypy on Tools/build	19s
Run mypy on Lib/test/libregrtest	22s
Run mypy on Tools/check-c-api-docs	17s
Run mypy on Tools/jit	18s
Run mypy on Tools/cases_generator	17s
Run mypy on Tools/clinic	18s
Run mypy on Lib/tomllib	17s
Run mypy on Tools/peg_generator	19s
Run mypy on Lib/_pyrepl	17s
	2m 44s

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