Problem:    Various pieces of code not covered by tests.
Solution:   Add a few more tests. (Yegappan Lakshmanan, closes #8245)

Problem:    Python tests fail without the channel feature.
Solution:   Add a feature check. (Dominique Pellé, closes #8226)

Problem:    Python 3: non-utf8 character cannot be handled.
Solution:   Change the string decode. (Björn Linse, closes #1053)

Problem:    Various typos.
Solution:   Fix spelling mistakes. (closes #7494)

Problem:    Test for list and dict fails.
Solution:   Adjust for using an empty list/dict for a null one.

Problem:    Not all tests are executed on Github Actions.
Solution:   Copy "src" to "src2" earlier. Recognize "src2" in a couple more
            places.  Add two tests to the list of flaky tests. (Ken Takata,
            closes #6798)

Problem:    assert_fails() checks the last error message.
Solution:   Check the first error, it is more relevant.  Fix all the tests
            that rely on the old behavior.

Problem:    Insufficient test coverage for Python.
Solution:   Add more test cases. (Yegappan Lakshmanan, closes #6415)

Problem:    ml_get error when using Python. (Yegappan Lakshmanan)
Solution:   Check the line number is not out of range.  Call "Check" with
            "fromObj" instead of "from".

Problem:    Not enough testing for Python.
Solution:   Add more tests.  Fix uncovered problems. (Yegappan Lakshmanan,
            closes #6392)