!4 Bring source file into correspondence with described in spec file

From: @wang--ge 
Reviewed-by: @caodongxia 
Signed-off-by: @caodongxia

gnuplot.spec

@@ -2,11 +2,11 @@
 Name: gnuplot
 Summary: a portable command-line driven graphing utility
 Version: %{major_minor}.6
-Release: 12
+Release: 13
 License: gnuplot and MIT
 URL: http://www.gnuplot.info/
 
-Source0: %{name}-%{version}-clean.tar.gz
+Source0: https://sourceforge.net/projects/gnuplot/files/gnuplot/5.0.6/gnuplot-5.0.6.tar.gz
 
 Patch0: gnuplot-4.2.0-refers_to.patch
 Patch1: gnuplot-4.2.0-fonts.patch
@@ -52,6 +52,7 @@ like Octave. Gnuplot has been supported and under active development since 1986.
 
 %prep
 %autosetup -p1
+rm -rf demo/lena*
 
 sed -i -e 's:"/usr/lib/X11/app-defaults":"%{_datadir}/X11/app-defaults":' src/gplt_x11.c
 iconv -f windows-1252 -t utf-8 ChangeLog > ChangeLog.aux
@@ -160,5 +161,8 @@ fi
 %exclude %{_mandir}/man1/%{name}-ja.1*
 
 %changelog
+* Tue Nov 22 2022 Ge Wang <wangge20@h-partners.com> - 5.0.6-13
+- Bring source file into correspondence with described in spec file
+
 * Mon Feb 17 2020 Tianfei <tianfei16@huawei.com> - 5.0.6-12
 - Package init