886252 - deleting 'wrote:' line in html reply to (mime) plain text email joins all lines

Status: UNCONFIRMED

(Thunderbird :: Untriaged, defect)

Description

[Max Waterman]

Attachment: email (with sensitive headers removed)

User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:21.0) Gecko/20100101 Firefox/21.0 (Beta/Release)
Build ID: 20130512193848

Steps to reproduce:

tb: 17.0.6 ubuntu: 13.04

1) reply to a plain text email like the one attached using the html compose mode
   compose shows something like :

On sometime, someone wrote:
| message
| message
| and so one

The 'wrote:' line is in 'Body Text', but the quoted text is 'Preformat'.

2) select all (ctrl-a)
  all text is selected
3) click 'outdent' icon
  all quoted text is outdented so that '|' are removed - formatting is maintained ie the previously quoted text is 'preformat' and 'wrote:' line is 'Body Text'.
4) position cursor at end of 'wrote:' line, ie after the colon
5) hit 'delete'


Actual results:

all (previously) quoted text is joined into a single line following the ':', and formatting is changed from 'Preformat' to 'Body Text'.


Expected results:

the first line of the quoted text should be moved up to the end of the 'wrote:' line. It isn't so important if the moved text is converted into 'Body Text' or remains as 'Preformat'.

When I attempt to reproduce myself with Thunderbird, I can't get it to fail - I suspect the difference in MIME headers.

Broken (probably sent by Microsoft Outlook) :

Content-Type: text/plain; charset="us-ascii"
MIME-Version: 1.0
Content-Transfer-Encoding: quoted-printable

Working (Thunderbird):

Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit

Let me know if I have removed too much from the headers on the attached file.

Comment 1

[Max Waterman]

I notice a similar effect if you select the whole message and change it from "Mixed" to "Body Text" - perhaps this bug is the same thing (and I think I recall seeing another bug with this sort of desciption).