message: Superseding

 
 1.7 Superseding
 ===============
 
 The ‘message-supersede’ command pops up a message buffer that will
 supersede the message in the current buffer.
 
    Headers matching the ‘message-ignored-supersedes-headers’ are removed
 before popping up the new message buffer.  The default is
 ‘^Path:\\|^Date\\|^NNTP-Posting-Host:\\|^Xref:\\|^Lines:\\|
 ^Received:\\|^X-From-Line:\\|^X-Trace:\\|^X-Complaints-To:\\|
 Return-Path:\\|^Supersedes:\\|^NNTP-Posting-Date:\\|^X-Trace:\\|
 ^X-Complaints-To:\\|^Cancel-Lock:\\|^Cancel-Key:\\|^X-Hashcash:\\|
 ^X-Payment:\\|^Approved:’.