Man-page-header-regexp

Man-page-header-regexp is a variable defined in `man.el'.
Its value is

"^[ 	]*\\([-a-zA-Z0-9_­+][-a-zA-Z0-9_.:­+]*(\\([0-9][a-zA-Z0-9+]*\\|[LNln]\\))\\).*\\1"

Documentation:
Regular expression describing the heading of a page.