Problem: Character classes are not well tested. They can differ between
platforms.
Solution: Add tests. In the documentation make clear which classes depend
on what library function. Only use :cntrl: and :graph: for ASCII.
(Kazunobu Kuriyama, Dominique Pelle, closes#1560)
Update the documentation.
Problem: On MS-Windows ":!start" does not work as expected.
Solution: When creating a process fails try passing the argument to
ShellExecute(). (Katsuya Hino, closes#1570)
Problem: Not enough testing for the client-server feature.
Solution: Add more tests. Add the remote_startserver() function. Fix that
a locally evaluated expression uses function-local variables.
Problem: When using the tiny version trying to load the matchit plugin
gives an error. On MS-Windows some default mappings fail.
Solution: Add a check if the command used is available. (Christian Brabandt)
Problem: The return value of mode() does not indicate that completion is
active in Replace and Insert mode. (Zhen-Huan (Kenny) Hu)
Solution: Add "c" or "x" for two kinds of completion. (Yegappan Lakshmanan,
closes#1397) Test some more modes.
Problem: When calling setpos() with a buffer argument it often is ignored.
(Matthew Malcomson)
Solution: Make the buffer argument work for all marks local to a buffer.
(neovim #5713) Add more tests.
Problem: It is not so easy to write a script that works with both Python 2
and Python 3, even when the Python code works with both.
Solution: Add 'pyxversion', :pyx, etc. (Marc Weber, Ken Takata)
Problem: 'formatprg' is a global option but the value may depend on the
type of buffer. (Sung Pae)
Solution: Make 'formatprg' global-local. (closes#1380)
Problem: To pass buffer content to system() and systemlist() one has to
first create a string or list.
Solution: Allow passing a buffer number. (LemonBoy, closes#1240)
Problem: When reading channel output in a timer, messages may go missing.
(Skywind)
Solution: Add the "drop" option. Write error messages in the channel log.
Don't have ch_canread() check for the channel being open.
Problem: When using ch_read() with zero timeout, can't tell the difference
between reading an empty line and nothing available.
Solution: Add ch_canread().
Problem: When the input or output is not a tty Vim appears to hang.
Solution: Add the --ttyfail argument. Also add the "ttyin" and "ttyout"
features to be able to check in Vim script.
Problem: Code for MS-Windows is complicated because of the exceptions for
old systems.
Solution: Drop support for MS-Windows older than Windows XP. (Ken Takata)
