Problem:    Early return when getting the 'formatlistpat' value.
Solution:   Remove the first line. (Christian Brabandt)

Problem:    Vim9: cannot use Vim9 syntax in mapping.
Solution:   Add <ScriptCmd> to use the script context for a command.

Problem:    Typing "interrupt" at debug prompt may keep exception around,
            causing function calls to fail.
Solution:   Discard any exception at the toplevel. (closes #9532)

Problem:    Wrong number in error message on 32 bit system. (John Paul Adrian
            Glaubitz)
Solution:   Add type cast. (closes #9527)

Problem:    Linux CI: unnecessarily installing packages
Solution:   Only install packages for huge build.  (Ozaki Kiichi,
            closes #9530)

Problem:    Sed script not recognized by the first line.
Solution:   Recognize a sed script starting with "#n". (Doug Kearns)

Problem:    'virtualedit' is window-local but using buffer-local enum.
Solution:   Use window-local enum. (closes #9529)

Problem:    Cached breakindent values not initialized properly.
Solution:   Initialize and cache formatlistpat. (Christian Brabandt,
            closes #9526, closes #9512)

Problem:    MacOS CI: unnecessarily doing "Install packages".
Solution:   Only do "Install packages" for huge build.  (Ozaki Kiichi,
            closes #9521)

Problem:    Virtcol is recomputed for statusline unnecessarily.
Solution:   Just use "w_virtcol". (closes #9523)