[TxMt] Insert todo with ruby idents =begin and =end

[Vesa-Pekka Palmu]

A annoyance with the insert todo -macro and ruby is that if the cursor is
indended when using it it places the =begin and =end tags at the current
level. The problem is that ruby only regognizes them at the start of the
line.

So this works:

if true
	puts "foo"
=begin
	TODO:
=end
end

But this doesn't work:

if true
	puts "foo"
	=begin
		TODO:
	=end
end

I haven't had the time to look at the insert-todo code too much so I can't
provide a patch, but the correct behaviour would be to make sure that
there is no whitespace before the comment block tags.

(IMO is rather silly of ruby that block comments can't have whitespace
before the =begin and =end tags...)