[issue19102] Add tests for CLI of the tabnanny module

[STINNER Victor]

STINNER Victor <vstinner at redhat.com> added the comment:

New changeset dfa9643d292dcaa14cbf3c44b8330ba2159976c0 by Victor Stinner (Jaysinh Shukla) in branch 'master':
bpo-19382: Adding test cases for module tabnanny (GH-851)
https://github.com/python/cpython/commit/dfa9643d292dcaa14cbf3c44b8330ba2159976c0

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@Jaysinh Shukla: I looked at Berker's old patch, and I think that it would be interesting to modify tabnanny to return with a non-zero exit code in case of failure. Maybe replace "return" with "sys.exit(1)" after errprint() calls.

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nosy: +jaysinh.shukla, vstinner

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