Include a pointer to vim-codefmt in the documentation.

[clintonc]

No description provided.

[simonrw]

Hi, thanks for your PR regarding vim-codefmt. I'm happy to mention it as an aside, but I feel the way you've suggested makes this plugin sound like advertisement for vim-codefmt.

I also feel my project is already a poor way of explaining vim's ability to pipe text through an external program, or the formatprg command anyway.

I'm thinking of adding something like the following to the bottom of the initial section:

---

ATTENTION: you probably don't need this plugin! See Why you may not need this plugin.

vim-yapf is a Vim plugin that applies yapf to your current file. yapf automatically formats Python code, based on improved syntax styles.

For a more fully featured plugin, consider using vim-codefmt