Problem:    Not all options code is covered by tests.
Solution:   Add more tests for options. (Yegappan Lakshmanan, closes #8369)

Problem:    Commands from winrestcmd() do not always work properly. (Leonid V.
            Fedorenchik)
Solution:   Repeat the size commands twice. (closes #7988)

Problem:    Too many problems with using all autocommand events.
Solution:   Disallow defining an autocommand for all events.

Problem:    No way to check for the cmdwin feature, cmdline_hist is now always
            enabled.
Solution:   Add has('cmdwin') support. Skip arglist test on Windows
            temporarily.

Problem:    Window resize test fails in very wide terminal.
Solution:   Resize using the 'columns' option.  (Vladimir Lomov, closes #7592)

Problem:    Crash when making the window width of the not-current window
            negative.
Solution:   Make sure the window width is not negative. (closes #7568)

Problem:    "2resize" uses size of current window.
Solution:   Use size of resized window. (Yasuhiro Matsumoto, closes #7152)

Problem:    Tests do not check the error number properly.0
Solution:   Add a colon after the error number. (closes #6869)

Problem:    :resize command not fully tested.
Solution:   Add a couple of tests. (Dominique Pellé, closes #6857)

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)