I've just started with
mu4e and was mainly following the manual. For that reason I wanted to change the
:subject in the headers view to
:thread-subject. I've linked gmail with offlineimap and as far as I understood the option
:thread-subject shouldn't repeat subjects for conversations. However, somehow it isn't picked up in my case. I've changed the mue4-headers.el like:
(defcustom mu4e-headers-fields '( (:human-date . 12) (:flags . 6) (:mailing-list . 10) (:from . 22) (:thread-subject . nil))
however, I still get displayed all subjects within a thread.