Problem:    Syntax highlighting can be slow.
Solution:   Include the NFA regexp engine.  Add the 'regexpengine' option to
            select which one is used. (various authors, including Ken Takata,
            Andrei Aiordachioaie, Russ Cox, Xiaozhou Liua, Ian Young)

Problem:    There is ":py3do" but no ":pydo".
Solution:   Add the ":pydo" command. (Lilydjwg)

Problem:    Python: not so easy to access tab pages.
Solution:   Add window.tabpage, make window.number work with non-current tab
            pages. (ZyX)

Problem:    Python does not have a "do" command like Perl or Lua.
Solution:   Add the ":py3do" command. (Lilydjwg)

Problem:    Python: It's not easy to change window/buffer/tabpage.
Solution:   Add ability to assign to vim.current.{tabpage,buffer,window}.
            (ZyX)

Problem:    Python: no easy access to tabpages.
Solution:   Add vim.tabpages and vim.current.tabpage. (ZyX)

Problem:    Python: No iterator for vim.list and vim.bufferlist.
Solution:   Add the iterators. Also fix name of FunctionType. Add tests for
            vim.buffers.  (ZyX)

Problem:    Python: List of buffers is not very useful.
Solution:   Make vim.buffers a map. No iterator yet. (ZyX)

Problem:    Python: Can't get position of window.
Solution:   Add window.row and window.col. (ZyX)

Problem:    Python: not easy to get to window number.
Solution:   Add vim.window.number. (ZyX)

Problem:    Autocommands are triggered by setwinvar() et al. Missing BufEnter
            on :tabclose. Duplicate WinEnter on :tabclose. Wrong order of
            events for :tablose and :tabnew.
Solution:   Fix these autocommand events. (Zyx)

Problem:    Typos in source files.
Solution:   Fix the typos. (Ken Takata)

Problem:    Python interface can't easily access options.
Solution:   Add vim.options, vim.window.options and vim.buffer.options. (ZyX)

Problem:    Python: Access to Vim variables is not so easy.
Solution:   Define vim.vars and vim.vvars. (ZyX)

Disable recognizing .rdf as a redif file.

Problem:    'fileignorecase' is missing in options window and quickref.
Solution:   Add the option.

Problem:    On some systems case of file names is always ignored, on others
            never.
Solution:   Add the 'fileignorecase' option to control this at runtime.
            Implies 'wildignorecase'.

Problem:    Matchparen does not update match when using auto-indenting.
            (Marc Aldorasi)
Solution:   Add the TextChanged and TextChangedI autocommand events.

Problem:    ":vimgrep //" matches everywhere.
Solution:   Make it use the previous search pattern. (David Bürgin)

Problem:    Clumsy to handle the situation that a variable does not exist.
Solution:   Add default value to getbufvar() et al. (Shougo Matsushita,
            Hirohito Higashi)

Problem:    Mappings are not aware of wildmenu mode.
Solution:   Add wildmenumode(). (Christian Brabandt)

Problem:    Can't compute a hash.
Solution:   Add the sha256() function. (Tyru, Hirohito Higashi)

Add missing test files.

Problem:    MzScheme interface doesn't work propely.
Solution:   Make it work better. (Sergey Khorev)

Problem:    Windows: IME composition may use a wrong font.
Solution:   Use 'guifontwide' for IME when it is set. (Taro Muraoka)

Problem:    char2nr() and nr2char() always use 'encoding'.
Solution:   Add argument to use utf-8 characters. (Yasuhiro Matsumoto)

Problem:    Matchit plugin does not handle space in #ifdef.
Solution:   Change matching pattern to allow spaces. (Mike Morearty)

Problem:    The justify macro does not always work correctly.
Solution:   Fix off-by-one error (James McCoy)

Problem:    Cannot properly test conceal mode.
Solution:   Add the screencol() and screenrow() functions.  Use them in
            test88. (Simon Ruderich)