# Contributing to Vim

Patches are welcome in whatever form.
Discussions about patches happen on the vim-dev maillist.
If you create a pull request on GitHub it will be
forwarded to the vim-dev maillist.  You can also send your patch there
directly.  An attachment with a unified diff format is preferred.
Information about the maillist can be found [on the Vim website].

[on the Vim website]: http://www.vim.org/maillist.php#vim-dev

Please consider adding a test.  Test coverage isn't very good yet, this needs
to improve.  Look through recent patches for examples.  The tests are located
under "src/testdir".


# Reporting issues

We use GitHub issues, but that is not a requirement.  Writing to the Vim
maillist is also fine.

Please use the GitHub issues only for actual issues. If you are not 100% sure
that your problem is a Vim issue, please first discuss this on the Vim user
maillist.  Try reproducing the problem without any plugins or settings:

    vim -N -u NONE

If you report an issue, please describe exactly how to reproduce it.
For example, don't say "insert some text" but say what you did exactly:
"ahere is some text<Esc>".
Ideally, the steps you list can be used to write a test to verify the problem
is fixed.

Feel free to report even the smallest problem, also typos in the documentation.

You can find known issues in the todo file: ":help todo".
Or open [the todo file] on GitHub to see the latest version.

[the todo file]: https://github.com/vim/vim/blob/master/runtime/doc/todo.txt