Variable: gnus-thread-operation-ignore-subject
gnus-thread-operation-ignore-subject is a customizable variable
defined in gnus-sum.el.gz.
Value
t
Documentation
If non-nil, subjects will be ignored when doing thread commands.
This affects commands like gnus-summary-kill-thread and
gnus-summary-lower-thread.
If this variable is nil, articles in the same thread with different
subjects will not be included in the operation in question. If this
variable is fuzzy, only articles that have subjects that are fuzzily
equal will be included.
Source Code
;; Defined in /usr/src/emacs/lisp/gnus/gnus-sum.el.gz
(defcustom gnus-thread-operation-ignore-subject t
"If non-nil, subjects will be ignored when doing thread commands.
This affects commands like `gnus-summary-kill-thread' and
`gnus-summary-lower-thread'.
If this variable is nil, articles in the same thread with different
subjects will not be included in the operation in question. If this
variable is `fuzzy', only articles that have subjects that are fuzzily
equal will be included."
:group 'gnus-thread
:type '(choice (const :tag "off" nil)
(const fuzzy)
(sexp :tag "on" t)))