Misleading statement

[Leedrick]

"Every line of code should appear to be written by a single person, no matter the number of contributors."

I think this is meant to say that the whole HTML document (or all documents?) should appear written by the same person, however it implies that only each individual line should appear written by the same person.

I.e. each line could have a different standard, but as long as each line appears written by the same person it's ok.

I'd suggest changing it to something like this:

"Every line of code in your HTML documents should appear to be written by the same person, no matter the number of contributors."

[Leedrick]

This would work too:

"Every line of code should appear to be written by the same person, no matter the number of contributors."