Problem:    Virtual text prop highlight continues after truncation.
Solution:   Recompute the length of attributes.

Problem:    Extra space after virtual text when 'linebreak' is set.
Solution:   Do not count virtual text when getting linebreak value.
            (closes #10884)

Problem:    Quarto files are not recognized.
Solution:   Recognize quarto files by the extension. (Jonas Strittmatter,
            closes #10880)

Problem:    Textprop test with line2byte() fails on MS-Windows.
Solution:   Fix updating chuncks in ml_delete_int().

Problem:    Stray logfile appears when running tests.
Solution:   Remove ch_logfile() calls.

Problem:    Cursor position wrong with wrapping virtual text in empty line.
Solution:   Adjust handling of an empty line. (closes #10875)

Problem:    Cursor position wrong with virtual text before Tab.
Solution:   Use the byte length, not the cell with, to compare the column.
            Correct tab size after text prop. (closes #10866)

Problem:    Cursor position wrong with 'virtualedit' and mouse click after end
            of the line. (Hermann Mayer)
Solution:   Do not use ScreenCols[] when 'virtualedit' is active.
            (closes #10868)

Problem:    Checking character options is duplicated and incomplete.
Solution:   Move checking to check_chars_options(). (closes #10863)

Problem:    Spell checking for capital not working with trailing space.
Solution:   Do not calculate cap_col at the end of the line. (Christian
            Brabandt, closes #10870, issue #10838)