:type 'function
:group 'wl-summary)
-(defcustom wl-summary-search-parent-by-subject-regexp "^[ \t]*\\(\\[[^:]+[,: ][0-9]+\\]\\)?[ \t]*re[\\^[: ]"
+(defcustom wl-summary-search-parent-by-subject-regexp "^[ \t]*\\(\\[[^:]+[,: ][0-9]+\\]\\)?[ \t]*re[\\^[:> ]"
"*If message does not have in-reply-to field nor references field and
subject matches this regexp, search parent message by subject matching."
:type 'string