Problem:    Various code is not fully tested.
Solution:   Add a few more tests. (Yegappan Lakshmanan, closes #8378)

Problem:    Finishing an abbreviation with a multi-byte char may not work.
Solution:   Escape K_SPECIAL in the typed character. (closes #8160)

Problem:    Special key names don't work if 'isident' is cleared.
Solution:   Add vim_isNormalIDc() and use it for special key names.
            (closes #2389)

Problem:    Various code not covered by tests.
Solution:   Add a few more test. (Yegappan Lakshmanan, closes #7995)

Problem:    New test throws exception.
Solution:   Adjust the function cleanup.

Problem:    col('.') may get outdated column value.
Solution:   Add a note to the help how to make this work and add a test for
            it. (closes #7971)

Problem:    <Cmd> does not handle CTRL-V.
Solution:   Call get_literal() after encountering CTRL-V. (closes #7387)

Problem:    Redoing a mapping with <Cmd> doesn't work properly.
Solution:   Fill the redo buffer.  Use "<SNR>" instead of a key code.
            (closes #7282)

Problem:    Making a mapping work in all modes is complicated.
Solution:   Add the <Cmd> special key. (Yegappan Lakshmanan, closes #7282,
            closes 4784, based on patch by Bjorn Linse)

Problem:    Assert_fails() setting emsg_silent changes normal execution.
Solution:   Use a separate flag in_assert_fails.