Problem:    Outdated references to the Mac Carbon GUI.
Solution:   Remove or update references. (Yee Cheng Chin, closes #6703)

Problem:    Various inconsistencies in test files.
Solution:   Add modelines where they were missing.  Use Check commands instead
            of silently skipping over tests.  Adjust indents and comments.
            (Ken Takata, closes #6695)

Problem:    Iminsert test fails when compiled with VIMDLL.
Solution:   Change condition. (Ken Takata, closes #6376)

Problem:    'imactivatefunc' and 'imstatusfunc' are not used in the GUI.
Solution:   Adjust the #ifdefs. (closes #6367)

Problem:    Various parts of code not covered by tests.
Solution:   Add more tests. (Yegappan Lakshmanan, closes #6300)

Problem:    Various Normal mode commands not fully tested.
Solution:   Add more tests. (Yegappan Lakshmanan, closes #5751)

Problem:    Some code in ex_getln.c not covered by tests.
Solution:   Add more tests. (Yegappan Lakshmanan, closes #5717)

Problem:    MS-Windows: test_iminsert fails without IME support.
Solution:   Skip the test when imgetstatus() doesn't work.

Problem:    Plugin cannot get the current IME status.
Solution:   Add the getimstatus() function. (closes #4904)

Problem:    Too many #ifdefs.
Solution:   Graduate FEAT_MBYTE, the final chapter.