Thank you for adding the section include capability to the IncludePage
plugin so quickly.
When I looked at your code I dismally came to the conclusion that it would
have taken me days (at best) to come up with a solution most certainly not
as efficient or as elegant as yours. :-)
The use of 'regular expressions' invariably seem to imbue allusions of
"Great Powers" to the inexperienced (well *to me* anyway; somehow I once
managed to conjure up a few file-processing sh scripts that used simple
incantations of 'sed' and 'awk', Hah, and looking back I have no idea how
I did it).