[arooaroo]

I know this is a minor point but using 'gg' to move to the first line is easier than '1G'.

[adolph]

The author started in vi, which has no gig as far as I can tell.

[a3n]

And I use :0, which is consistent with :N to get to the Nth line, which I also use. (I know, :1 same, just my habit.) And I could use :% to get to the last line, for more consistency, but G is my habit there.

Many ways to edit a cat.