The number increment example doesn't seem to work for me. It says to start with this:

    1. a
    1. b
    1. c

The post says to "select in VISUAL mode the last two lines and hit `g CTRL+a`". So I guess with shift+v select the bottom two lines, and then I hit g, space, and Ctrl+a. I get:

    1. a
    2. b
    2. c

The post says that the last line should now start with 3 instead of 1, or in my case 2. The behavior is the same as when omitting g+space for me. Am I doing it wrong?