The Debian packaging of paredit-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/paredit-el
    % cd paredit-el
    % git log --oneline 1.2.3..debian/1.2.3-1 -- . ':!debian'

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

A single combined diff, containing all the changes, follows.
--- paredit-el-24.orig/genhtml.sh
+++ paredit-el-24/genhtml.sh
@@ -4,8 +4,6 @@ set -Ceu
 
 : ${EMACS:=emacs}
 
-exec ${EMACS} --batch --load paredit.el --eval '
-(with-temp-buffer
+exec ${EMACS} --batch --load paredit.el --eval '(with-temp-buffer
   (paredit-insert-html-examples)
-  (write-file "paredit.html"))
-'
+  (write-file "paredit.html"))'