Break and wrap long contiguous text in source block when linenums are enabled

[mojavelinux]

If linenums are enabled on a source block, and contiguous text (text with no spaces) does not fit on a single line, the source wrap logic skips the rest of the page and writes the text on the next page. Instead, it should break the text so it continues on the next line.

Here's what currently happens:

[mojavelinux]

It's the same problem if the contiguous text falls on a wrapped line.

[%linenums,text]
----
one
two and then sooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooome
three
----