save and restore lisp/muse-autoloads.el to prevent it from changing

debian/changelog

@@ -21,6 +21,8 @@ muse-el (3.20+dfsg-8) unstable; urgency=medium
     lintian warning superfluous-file-pattern.
   * Fix d/watch to track the savannah git repo.
   * Drop lintian override of wrong-section-according-to-package-name.
+  * Save and restore lisp/muse-autoloads.el to prevent it from changing
+    when build-twice-in-a-row.  Closes: #1048114.
 
  -- Xiyue Deng <manphiz@gmail.com>  Thu, 24 Aug 2023 14:12:01 -0700
 

debian/rules

@@ -5,6 +5,10 @@
 
 override_dh_auto_build:
 	make examples
+	# muse-autoloads.el gets regenerated during build.  Store the original
+	# file to be restored during clean.  More on
+	# https://bugs.debian.org/1048114.
+	cp -f lisp/muse-autoloads.el debian/.debhelper/muse-autoloads.el
 	make autoloads
 
 override_dh_auto_install:
@@ -15,3 +19,9 @@ override_dh_installchangelogs:
 
 override_dh_compress:
 	dh_compress -X.pdf
+
+override_dh_auto_clean:
+	# muse-autoloads.el gets regenerated during build.  Restore the original
+	# file during clean.  More on https://bugs.debian.org/1048114.
+	-cp -f debian/.debhelper/muse-autoloads.el lisp/muse-autoloads.el
+	dh_auto_clean