Fix from gnulib upstream, commit 175e0bc (bug #1863423).

diffutils.spec

@@ -1,11 +1,12 @@
 Summary: A GNU collection of diff utilities
 Name: diffutils
 Version: 3.7
-Release: 6%{?dist}
+Release: 7%{?dist}
 URL: http://www.gnu.org/software/diffutils/diffutils.html
 Source: ftp://ftp.gnu.org/gnu/diffutils/diffutils-%{version}.tar.xz
 Patch1: diffutils-cmp-s-empty.patch
 Patch2: diffutils-i18n.patch
+Patch3: diffutils-fix-gnulib-tests.patch
 License: GPLv3+
 Provides: bundled(gnulib)
 BuildRequires:  gcc
@@ -32,6 +33,9 @@ Install diffutils if you need to compare text files.
 
 %patch2 -p1 -b .i18n
 
+# Fix from gnulib upstream, commit 175e0bc (bug #1863423).
+%patch3 -p1 -b .fix-gnulib-tests
+
 # Run autoreconf for aarch64 support (bug #925256).
 autoreconf
 
@@ -58,6 +62,9 @@ make check
 %{_infodir}/diffutils.info*
 
 %changelog
+* Thu Oct  8 2020 Tim Waugh <twaugh@redhat.com> - 3.7-7
+- Fix from gnulib upstream, commit 175e0bc (bug #1863423).
+
 * Sat Aug 01 2020 Fedora Release Engineering <releng@fedoraproject.org> - 3.7-6
 - Second attempt - Rebuilt for
   https://fedoraproject.org/wiki/Fedora_33_Mass_Rebuild