apt-get update error

[Bob Bernstein <poobah@ruptured-duck.com>]

Greetings earthlings!

I am running an old Jessie I refuse to let go of, on an 
amd64. # uname -a
Linux debian.localdomain 3.16.0-7-amd64 #1 SMP Debian 3.16.59-1 (2018-10-03) x86_64 GNU/Linux

Here is the apt-get update output error:

W: Failed to fetch http://deb.debian.org/debian/dists/jessie-updates/InRelease  Unable to find expected entry 'main/source/Sources' in Release file (Wrong sources.list entry or malformed file)

This is my sources.list. It represents my effort to 
invoke LTS for this Jessie. I can't see anything in it that even vaguely resembles the line above. 

-snip-
deb http://deb.debian.org/debian/ jessie main contrib non-free

deb-src http://deb.debian.org/debian/ jessie main contrib non-free

deb http://security.debian.org/ jessie/updates main contrib non-free

deb-src http://security.debian.org/ jessie/updates main contrib non-free

deb http://deb.debian.org/debian/ jessie-updates main contrib non-free

deb-src http://deb.debian.org/debian/ jessie-updates main contrib non-free
-snip-

Any and all contributions will be gratefully and thoroughly examined.

Thank you.


-- 
"In our age there is no such thing as ‘keeping out of 
politics’. All issues are political issues, and politics 
itself is a mass of lies, evasions, folly, hatred, and 
schizophrenia."

 George Orwell "Politics and the English Language" (1946)