The Debian packaging of plz-el is maintained in git, using the merging
workflow described in dgit-maint-merge(7).  There isn't a patch queue that can
be represented as a quilt series.

A detailed breakdown of the changes is available from their canonical
representation - git commits in the packaging repository.  For example, to see
the changes made by the Debian maintainer in the first upload of upstream
version 1.2.3, you could use:

    % git clone https://git.dgit.debian.org/plz-el
    % cd plz-el
    % git log --oneline 1.2.3..debian/1.2.3-1 -- . ':!debian'

(If you have dgit, use `dgit clone plz-el`, rather than plain `git clone`.)

A single combined diff, containing all the changes, follows.
--- plz-el-0.9.1+dfsg.orig/README.org
+++ plz-el-0.9.1+dfsg/README.org
@@ -1,4 +1,8 @@
 #+TITLE: plz.el
+#+OPTIONS: broken-links:t *:t
+#+TEXINFO_DIR_CATEGORY: Emacs
+#+TEXINFO_DIR_TITLE: Plz: (plz)
+#+TEXINFO_DIR_DESC: HTTP library using Curl as a backend
 
 #+PROPERTY: LOGGING nil
 
@@ -355,8 +359,6 @@ GPLv3
 
 # Copied from org-super-agenda's readme, in which much was borrowed from Org's =org-manual.org=.
 
-#+OPTIONS: broken-links:t *:t
-
 ** Info export options
 
 # NOTE: These are moved to the top of the file.
