[SixteenBlue]

If you include commas that's 23,233,560 characters, which would be 22.15 megabytes (at one byte per char). Maybe 22.45 is just a typo?

[nicktelford]

There are line breaks at a fixed interval so that it wraps at 80 chars. I imagine that makes up the other ~300KB.

Edit: Line-breaks do indeed make up the bulk of the overhead, but it's also an HTML page so there's some boilerplate markup at the beginning and end of the file.

[evilduck]

Maybe document container formatting overhead? Filesystem/disk block sizes?