With word wrap enabled, new trailing spaces are not wrapped

[jasonsanjose]

1. Open http://codemirror.net/demo/indentwrap.html
2. Add spaces at the end of line 3, enough to cause wrapping

Actual: Line is not wrapped, horizontal scrollbar appears.
Expected: Line should wrap. Sublime Text has different wrapping behavior, but I'm not entirely convinced that it's good. It breaks twice, once to wrap the span of spaces, then again at some seemingly arbitrary point to break the span in two.

[0b10011]

It should be noted this behaves correctly in Firefox currently (but not Chrome).

[marijnh]

This is another symptom of #1362