I was surprised to find that my white-space: pre-wrap; text is wrapping at > and " characters. I thought it would only wrap at new lines, -, and after one or more spaces.
Here is a fiddle.
It wraps after ", before <. It also wraps after >, before <.
I can't find anything in the spec that says what characters allow wrapping. It only says "Lines are broken at preserved newline characters, and as necessary to fill line boxes.".
The same characters which cause wrapping normally will also cause wrapping with white-space: pre-wrap;, with the addition that newlines and whitespace in the text will also cause newlines and whitespace in the output.
Try removing white-space: pre-wrap; in your example and you will see that the only change is that there are no longer any blank lines. Otherwise the wrapping behaviour is the same.
See: https://drafts.csswg.org/css-text/#valdef-white-space-pre-wrap
pre-wrap: Like 'pre', this value preserves white space; but like 'normal', it allows wrapping.
For more details about when wrapping can occur normally, see: https://drafts.csswg.org/css-text/#line-breaking
