I want to CC a whole thread to somewhere else, is there a way to export
the merged thread to one text file?

It can be like this:

,----
| Subject: some title
| From: the_first_one@some-addr.com
|
| He/She said something
|
| Subject: Re: some title
| From: the_second_one@some-other-addr.com
|
| He/She replied something
|
| [...]
|
| Subject: a changed title
| From: a_creative_man@his-addr.com
|
| He/She replied something
`----

Is there a stock function for this?  Or do I have to do it myself?

-- 
Carl Lei (XeCycle)
Department of Physics, Shanghai Jiao Tong University
OpenPGP public key: 7795E591
Fingerprint: 1FB6 7F1F D45D F681 C845 27F7 8D71 8EC4 7795 E591