Problem:    Vim9: skipping over white space after list.
Solution:   Do not skip white space, a following [] would be misinterpreted.
            (closes #6552)  Fix a few side effects.

Problem:    Moving to next sentence gets stuck on quote.
Solution:   When moving to the next sentence doesn't result in moving, advance
            a character and try again. (closes #6291)

Problem:    Search code not sufficiently tested.
Solution:   Add more tests. (Yegappan Lakshmanan, closes #5999)

Problem:    vi' does not always work when 'selection' is exclusive.
Solution:   Adjust start position.

Problem:    vi' sometimes does not select anything.
Solution:   Recognize an empty selection. (Christian Brabandt, closes #5183)

Problem:    Some balloon tests don't run when they can.
Solution:   Split GUI balloon tests off into a separate file. (Ozaki Kiichi,
            closes #4538)  Change the feature check into a command for
            consistency.

Problem:    Tests are silently skipped.
Solution:   Throw an exception for skipped tests in more places.

Problem:    Failure for selecting quoted text object moves cursor.
Solution:   Restore the Visual selection on failure. (Christian Brabandt,
            closes #4024)

Problem:    Test files still use function!.
Solution:   Remove the exclamation mark.  Fix overwriting a function.

Problem:    "cit" on an empty HTML tag changes the whole tag.
Solution:   Only adjust the area in Visual mode. (Andy Massimino,
            closes #3332)