Split off from bug 14748. The plaintext output converter should handle quoted replies, but there are other problems with reply as well. I'll make a test file to handle this case.
M12 with all the other output formatting issues.
Fixed; now blockquote type=cite appears indented with "> " instead of spaces. This doesn't fix mail reply, though, since they're not using the output system and the code in libmime is different.
verified in 11/30 build.
Bulk move of all "Output" component bugs to new "DOM to Test Conversion" component. Output will be deleted as a component.