I see what you're saying, but that looks like a function call embedded in the HTML.

Embedding your programming into HTML doesn't make it any less programming. Otherwise, you could say web programming doesn't exist since it's all just HTML script tags.

Hmm, yes, the readable() value does look like a function call with the sort of unforgiving, indecipherable syntax that can give a non-programmer trouble when they have to do more than paste a sample (e.g. actually enter a filename, including the path). That blurs the "programming" line more.