The added mappings are:
Change surround around the current insertion point(s).
Delete surround around the current insertion point(s).
Wrap the selection defined by
<motion> with something - e.g.
ys3iw wraps 3 words beginning with the word containing the insertion point(s).
Wrap the visual selection with something. Note that this overrides the Vintage-defined (and Vim) behaviour of
s in visual mode which deletes the visual selection and enters insert mode - you can still use
c to do this.
You'll need to install Sublime-surround first or these mappings won't do anything. Then install Vintage Sublime Surround in one of the following ways. (Hint: use Package Control.)
Package Control is "a full-featured package manager that helps discovering, installing, updating and removing packages for Sublime Text 2." It's the preferred way to manage your Sublime Text 2 Packages directory.
Follow these instructions to install Vintage-sublime-surround with Package Control.
Go to your Sublime Text 2
Packages directory and clone the repository using the command below:
$ git clone https://github.com/jcartledge/vintage-sublime-surround.git
Download the files using the .zip download option.
Unzip the files.
Copy the folder to your Sublime Text 2 Packages directory.