modernize spec file (Group tag, %clean, %defattr)

zsh.spec

@@ -1,12 +1,9 @@
-# this file is encoded in UTF-8  -*- coding: utf-8 -*-
-
 Summary: Powerful interactive shell
 Name: zsh
 Version: 5.3.1
-Release: 11%{?dist}
+Release: 12%{?dist}
 License: MIT
 URL: http://zsh.sourceforge.net/
-Group: System Environment/Shells
 Source0: https://www.zsh.org/pub/%{name}-%{version}.tar.xz
 Source1: zlogin.rhs
 Source2: zlogout.rhs
@@ -46,7 +43,6 @@ mechanism, and more.
 
 %package html
 Summary: Zsh shell manual in html format
-Group: System Environment/Shells
 BuildArch:	noarch
 
 %description html
@@ -93,8 +89,6 @@ make %{?_smp_mflags} all html
 make check
 
 %install
-rm -rf $RPM_BUILD_ROOT
-
 %makeinstall install.info \
   fndir=$RPM_BUILD_ROOT%{_datadir}/%{name}/%{version}/functions \
   sitefndir=$RPM_BUILD_ROOT%{_datadir}/%{name}/site-functions \
@@ -102,7 +96,7 @@ rm -rf $RPM_BUILD_ROOT
   sitescriptdir=$RPM_BUILD_ROOT%{_datadir}/%{name}/scripts \
   runhelpdir=$RPM_BUILD_ROOT%{_datadir}/%{name}/%{version}/help
 
-rm -f ${RPM_BUILD_ROOT}%{_bindir}/zsh-%{version}
+rm -f $RPM_BUILD_ROOT%{_bindir}/zsh-%{version}
 rm -f $RPM_BUILD_ROOT%{_infodir}/dir
 
 mkdir -p ${RPM_BUILD_ROOT}%{_sysconfdir}
@@ -126,9 +120,6 @@ sed -i "s!$RPM_BUILD_ROOT%{_datadir}/%{name}/%{version}/help!%{_datadir}/%{name}
     $RPM_BUILD_ROOT%{_datadir}/zsh/%{version}/functions/{run-help,_run-help}
 
 
-%clean
-rm -rf $RPM_BUILD_ROOT
-
 %post
 if [ "$1" = 1 ]; then
   if [ ! -f %{_sysconfdir}/shells ] ; then
@@ -164,7 +155,6 @@ fi
 
 
 %files
-%defattr(-,root,root)
 %doc README LICENCE Etc/BUGS Etc/CONTRIBUTORS Etc/FAQ FEATURES MACHINES
 %doc NEWS Etc/zsh-development-guide Etc/completion-style-guide
 %attr(755,root,root) %{_bindir}/zsh
@@ -176,10 +166,12 @@ fi
 %config(noreplace) %{_sysconfdir}/z*
 
 %files html
-%defattr(-,root,root)
 %doc Doc/*.html
 
 %changelog
+* Tue Aug 01 2017 Kamil Dudka <kdudka@redhat.com> - 5.3.1-12
+- modernize spec file (Group tag, %%clean, %%defattr)
+
 * Thu Jul 27 2017 Fedora Release Engineering <releng@fedoraproject.org> - 5.3.1-11
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_27_Mass_Rebuild