diff -Nru octave-interval-3.2.1/debian/changelog octave-interval-3.2.1/debian/changelog
--- octave-interval-3.2.1/debian/changelog	2023-08-14 17:29:22.000000000 +0000
+++ octave-interval-3.2.1/debian/changelog	2023-08-30 05:47:30.000000000 +0000
@@ -1,8 +1,15 @@
-octave-interval (3.2.1-5build1) mantic; urgency=medium
+octave-interval (3.2.1-6) unstable; urgency=medium
 
-  * No-change rebuild against octave-abi-58
+  * Team upload
 
- -- Graham Inggs <ginggs@ubuntu.com>  Mon, 14 Aug 2023 17:29:22 +0000
+  * d/p/display-plus-intervaltotext.patch: New patch.
+    Thanks to Vincent Lefèvre for proposing the fix (Closes: #1050796)
+  * d/control:
+    + Bump Standards-Version to 4.6.2 (no changes needed)
+    + Update Homepage URL
+  * d/copyright: Update Source URL
+
+ -- Rafael Laboissière <rafael@debian.org>  Wed, 30 Aug 2023 02:47:30 -0300
 
 octave-interval (3.2.1-5) unstable; urgency=medium
 
diff -Nru octave-interval-3.2.1/debian/control octave-interval-3.2.1/debian/control
--- octave-interval-3.2.1/debian/control	2022-12-05 16:25:15.000000000 +0000
+++ octave-interval-3.2.1/debian/control	2023-08-30 05:47:30.000000000 +0000
@@ -9,8 +9,8 @@
                dh-sequence-octave,
                ghostscript,
                libmpfr-dev
-Standards-Version: 4.6.1
-Homepage: https://octave.sourceforge.io/interval/
+Standards-Version: 4.6.2
+Homepage: https://gnu-octave.github.io/packages/interval/
 Vcs-Git: https://salsa.debian.org/pkg-octave-team/octave-interval.git
 Vcs-Browser: https://salsa.debian.org/pkg-octave-team/octave-interval
 Testsuite: autopkgtest-pkg-octave
diff -Nru octave-interval-3.2.1/debian/copyright octave-interval-3.2.1/debian/copyright
--- octave-interval-3.2.1/debian/copyright	2022-12-05 16:25:15.000000000 +0000
+++ octave-interval-3.2.1/debian/copyright	2023-08-30 05:47:30.000000000 +0000
@@ -1,7 +1,7 @@
 Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
 Upstream-Name: Interval package for Octave
 Upstream-Contact: The Octave Community <octave-maintainers@octave.org>
-Source: https://octave.sourceforge.io/interval/
+Source: https://gnu-octave.github.io/packages/interval/
 
 Files: *
 Copyright: 2014-2018, 2022 Oliver Heimlich <oheim@posteo.de>
@@ -105,7 +105,7 @@
 License: FSFAP
 
 Files: debian/*
-Copyright: 2016-2020, 2022 Rafael Laboissière <rafael@debian.org>
+Copyright: 2016-2020, 2022, 2023 Rafael Laboissière <rafael@debian.org>
            2015-2017 Oliver Heimlich
 License: GPL-3+
 
diff -Nru octave-interval-3.2.1/debian/.gitignore octave-interval-3.2.1/debian/.gitignore
--- octave-interval-3.2.1/debian/.gitignore	1970-01-01 00:00:00.000000000 +0000
+++ octave-interval-3.2.1/debian/.gitignore	2023-08-30 05:47:30.000000000 +0000
@@ -0,0 +1,7 @@
+/files
+/octave-interval
+/octave-interval-doc
+/*.debhelper.log
+/*.substvars
+/.debhelper/
+/debhelper-build-stamp
diff -Nru octave-interval-3.2.1/debian/patches/display-plus-intervaltotext.patch octave-interval-3.2.1/debian/patches/display-plus-intervaltotext.patch
--- octave-interval-3.2.1/debian/patches/display-plus-intervaltotext.patch	1970-01-01 00:00:00.000000000 +0000
+++ octave-interval-3.2.1/debian/patches/display-plus-intervaltotext.patch	2023-08-30 05:47:30.000000000 +0000
@@ -0,0 +1,31 @@
+Description: Adjust BISTs in src/intervaltotext.cc for MPFR v2.4.1
+ GNU MPFR had a bug in the formatting function, causing the "+" flag
+ to be ignored for Inf and NaN. It is now honored in version 2.4.1.
+ The BISTs in src/intervaltotext.cc are fixed for the coping with the
+ correct behavior.
+Author: Rafael Laboissière <rafael@debian.org>
+Bug: https://savannah.gnu.org/bugs/?64607
+Bug-Debian: https://bugs.debian.org/1050796
+Forwarded: not-needed
+Last-Update: 2023-08-29
+
+--- octave-interval-3.2.1.orig/src/intervaltotext.cc
++++ octave-interval-3.2.1/src/intervaltotext.cc
+@@ -1281,7 +1281,7 @@ DEFUN_DLD (intervaltotext, args, nargout
+ %!assert (intervaltotext (infsup (), "[cg]"), "[empty]");
+ 
+ %!assert (intervaltotext (infsup (-inf, inf), "[g]"), "[Entire]");
+-%!assert (intervaltotext (infsup (-inf, inf), "[<g]"), "[-inf, inf]");
++%!assert (intervaltotext (infsup (-inf, inf), "[<g]"), "[-inf, +inf]");
+ 
+ %!assert (intervaltotext (infsup (2, 3), "[3g]"), "[  2,   3]");
+ %!assert (intervaltotext (infsup (2, 3), "[-3g]"), "[2  , 3  ]");
+@@ -1297,7 +1297,7 @@ DEFUN_DLD (intervaltotext, args, nargout
+ %!assert (intervaltotext (infsup (2, 3), "[f]"), "[2.000000, 3.000000]");
+ %!assert (intervaltotext (infsup (2, 3), "[e]"), "[2.000000e+00, 3.000000e+00]");
+ %!assert (intervaltotext (infsup (2, 3), "[E]"), "[2.000000E+00, 3.000000E+00]");
+-%!assert (intervaltotext (infsup (-inf, inf), "[<F]"), "[-INF, INF]");
++%!assert (intervaltotext (infsup (-inf, inf), "[<F]"), "[-INF, +INF]");
+ 
+ %!assert (intervaltotext (infsup (2, 3), "?g"), "2.5?5");
+ %!assert (intervaltotext (infsup (2, 3), "9:?g"), "    2.5?5");
diff -Nru octave-interval-3.2.1/debian/patches/series octave-interval-3.2.1/debian/patches/series
--- octave-interval-3.2.1/debian/patches/series	2022-12-05 16:25:15.000000000 +0000
+++ octave-interval-3.2.1/debian/patches/series	2023-08-30 05:47:30.000000000 +0000
@@ -4,3 +4,4 @@
 xtest-in-infsup-methods.patch
 octave7.patch
 add-distclean-target.patch
+display-plus-intervaltotext.patch