format=flowed for mail plaintext output. Restructures the plaintext
output wrapping code, wholly or partially fixes numerous bugs in plaintext
output (13278, 13442, 17823, 17824, 13753, 12551), makes the automated
tests work on Windows and adds some new automated tests. r=akkana.
- Rewrite wrapping logic for plaintext output sink,
and run all output through the wrapping/formatting Write method
(which now has logic to determine when we should be wrapping).
- Handle blockquote type=cite mail quotes.
- Write several new regression tests for plaintext output bugs,
and include those tests and their expected output into the
automated output test.
r=sfraser,harishd