Add missing tests to the dis module

[jkchandalia]

Improve test coverage for the dis module i.e cpython/lib/dis.py, tests are in cpython/Lib/tests/test_dis.py. Missing tests include:

• dis.disco
• dis.findlinestarts

Linked PRs

• GH-103804: Add test for dis.findlinestarts #103806
• GH-103804: Add test for dis.disco #103901

[nanjekyejoannah]

@jkchandalia can you discuss your motivation for dis.disco being covered before we close this? I didnt follow your email very well. I am abit busy until end of week, so @iritkatriel can follow up if she has time before then.

[jkchandalia]

@nanjekyejoannah I had a look at dis.disco which is the other function we mentioned in the issue. It looks like disco = disassemble and only exists only for backward compatibility which is what I see here:

cpython/Lib/dis.py

Line 608 in b934f97

disco = disassemble # XXX For backwards compatibility

Because dis.disassemble appears to be thoroughly tested, I was wondering if we don't need to write tests for disco explicitly?

[iritkatriel]

disco is documented: https://docs.python.org/3/library/dis.html#dis.disco
so strictly speaking it should be tested.

Perhaps it should also be deprecated, I don't know the history.

[jkchandalia]

@iritkatriel @nanjekyejoannah it looks like dis.disco was introduced in the initial python commit in 1990 by Guido: 217a5fa

I'm assuming it's been kept around for backwards compatibility and may not yet be a good idea to deprecate but I defer to your judgement. I've opened a PR with a test for dis.disco assuming we want to keep this around.