Trim all trailing whitespace - including \r

Fixes #33

Makefile

@@ -17,7 +17,7 @@ check:
 	temp=`mktemp` ;\
 	for i in testing/*.spec; do \
 	  perl prepare_spec $$i > $$temp ;\
-	  diff -u $$temp $$i.out ;\
+	  diff -u $$i.out $$temp ;\
 	done ;\
 	rm $$temp
 

prepare_spec

@@ -271,6 +271,8 @@ sub read_and_parse_old_spec {
 
   while (@readspec) {
     $_ = shift @readspec;
+    # trim all trailing whitespace (including \r, see issue 33)
+    $_ =~ s/\s+$//;
 
     if ( /^\s*$/ && $current_section ne "description") {
       # stop preamble parsing on two blank lines

testing/dos2unix.spec

@@ -0,0 +1,67 @@
+#
+# spec file for package dos2unix
+#
+# Copyright (c) 2020 SUSE LLC
+#
+# All modifications and additions to the file contributed by third parties
+# remain the property of their copyright owners, unless otherwise agreed
+# upon. The license for this file, and modifications and additions to the
+# file, is the same license as for the pristine package itself (unless the
+# license for the pristine package is not an Open Source License, in which
+# case the license is the MIT License). An "Open Source License" is a
+# license that conforms to the Open Source Definition (Version 1.9)
+# published by the Open Source Initiative.
+
+# Please submit bugfixes or comments via https://bugs.opensuse.org/
+#
+
+
+Name:           dos2unix
+Version:        7.4.2
+Release:        0
+Summary:        Text converters to and from DOS/MAC to UNIX
+License:        BSD-2-Clause
+Group:          Productivity/Text/Convertors
+URL:            https://waterlan.home.xs4all.nl/dos2unix.html
+Source:         https://waterlan.home.xs4all.nl/dos2unix/dos2unix-%{version}.tar.gz
+Source2:        https://waterlan.home.xs4all.nl/dos2unix/dos2unix-%{version}.tar.gz.asc
+# http://keys.gnupg.net/pks/lookup?op=get&search=0x38C1F572B12725BE
+Source3:        %{name}.keyring
+Provides:       unix2dos = %{version}
+Obsoletes:      unix2dos < %{version}
+
+%description
+Dos2unix is used to convert plain text from DOS (CR/LF) format. Mac2unix
+converts plain text from MAC (CR) format to UNIX format (LF).
+
+Unix2dos converts plain text files from UNIX
+format to DOS format and unix2dos converts from UNIX to MAC format.
+
+%prep
+%setup -q
+find . -type f -exec chmod -x '{}' +
+
+%build
+export RPM_OPT_FLAGS
+%make_build CC="gcc" HTMLEXT="html"
+
+%install
+%make_install docdir=%{_defaultdocdir}/%{name} HTMLEXT="html"
+%find_lang dos2unix --all-name --with-man
+
+%files -f dos2unix.lang
+%defattr(-,root,root,0755)
+%doc %{_defaultdocdir}/%{name}
+%{_bindir}/*
+%{_mandir}/*/*.1%{?ext_man}
+%doc %lang(de) %dir %{_mandir}/de
+%doc %lang(es) %dir %{_mandir}/es
+%doc %lang(fr) %dir %{_mandir}/fr
+%doc %lang(nl) %dir %{_mandir}/nl
+%doc %lang(pl) %dir %{_mandir}/pl
+%doc %lang(pt_BR) %dir %{_mandir}/pt_BR
+%doc %lang(sv) %dir %{_mandir}/sv
+%doc %lang(uk) %dir %{_mandir}/uk
+%doc %lang(zh_CN) %dir %{_mandir}/zh_CN
+
+%changelog

testing/dos2unix.spec.out

@@ -0,0 +1,67 @@
+#
+# spec file for package dos2unix
+#
+# Copyright (c) 2021 SUSE LLC
+#
+# All modifications and additions to the file contributed by third parties
+# remain the property of their copyright owners, unless otherwise agreed
+# upon. The license for this file, and modifications and additions to the
+# file, is the same license as for the pristine package itself (unless the
+# license for the pristine package is not an Open Source License, in which
+# case the license is the MIT License). An "Open Source License" is a
+# license that conforms to the Open Source Definition (Version 1.9)
+# published by the Open Source Initiative.
+
+# Please submit bugfixes or comments via https://bugs.opensuse.org/
+#
+
+
+Name:           dos2unix
+Version:        7.4.2
+Release:        0
+Summary:        Text converters to and from DOS/MAC to UNIX
+License:        BSD-2-Clause
+Group:          Productivity/Text/Convertors
+URL:            https://waterlan.home.xs4all.nl/dos2unix.html
+Source:         https://waterlan.home.xs4all.nl/dos2unix/dos2unix-%{version}.tar.gz
+Source2:        https://waterlan.home.xs4all.nl/dos2unix/dos2unix-%{version}.tar.gz.asc
+# http://keys.gnupg.net/pks/lookup?op=get&search=0x38C1F572B12725BE
+Source3:        %{name}.keyring
+Provides:       unix2dos = %{version}
+Obsoletes:      unix2dos < %{version}
+
+%description
+Dos2unix is used to convert plain text from DOS (CR/LF) format. Mac2unix
+converts plain text from MAC (CR) format to UNIX format (LF).
+
+Unix2dos converts plain text files from UNIX
+format to DOS format and unix2dos converts from UNIX to MAC format.
+
+%prep
+%setup -q
+find . -type f -exec chmod -x '{}' +
+
+%build
+export RPM_OPT_FLAGS
+%make_build CC="gcc" HTMLEXT="html"
+
+%install
+%make_install docdir=%{_defaultdocdir}/%{name} HTMLEXT="html"
+%find_lang dos2unix --all-name --with-man
+
+%files -f dos2unix.lang
+%defattr(-,root,root,0755)
+%doc %{_defaultdocdir}/%{name}
+%{_bindir}/*
+%{_mandir}/*/*.1%{?ext_man}
+%doc %lang(de) %dir %{_mandir}/de
+%doc %lang(es) %dir %{_mandir}/es
+%doc %lang(fr) %dir %{_mandir}/fr
+%doc %lang(nl) %dir %{_mandir}/nl
+%doc %lang(pl) %dir %{_mandir}/pl
+%doc %lang(pt_BR) %dir %{_mandir}/pt_BR
+%doc %lang(sv) %dir %{_mandir}/sv
+%doc %lang(uk) %dir %{_mandir}/uk
+%doc %lang(zh_CN) %dir %{_mandir}/zh_CN
+
+%changelog

testing/gdb.spec.out

@@ -489,7 +489,7 @@ This package provides INFO, HTML and PDF user manual for GDB.
 
 %if %{build_testsuite}
 %description
-Results from running the GDB testsuite. 
+Results from running the GDB testsuite.
 %endif
 
 %prep
@@ -671,7 +671,7 @@ export CFLAGS="$RPM_OPT_FLAGS"
 
 # Add your -Wno-x/-Wno-error=y options here:
 for opt in -Wno-error=odr; do
-  # checking for acceptance of -Wno-foo is a bit wieldy: GCC doesn't 
+  # checking for acceptance of -Wno-foo is a bit wieldy: GCC doesn't
   # warn about unknown -Wno- flags, _except_ if there are other
   # diagnostics as well, so let's force an uninitialized use warning
   # and grep for the diagnostic about the -Wno flag:
@@ -1150,7 +1150,7 @@ cp -p %{SOURCE3} $RPM_BUILD_ROOT%{_mandir}/man1/gstack.1
 %if 0%{?el5:1}
 rm -f $RPM_BUILD_ROOT%{_infodir}/annotate.info*
 rm -f $RPM_BUILD_ROOT%{_infodir}/gdb.info*
-%endif # 0%{?el5:1} 
+%endif # 0%{?el5:1}
 # -j1: There is some race resulting in:
 # /usr/bin/texi2dvi: texinfo.tex appears to be broken, quitting.
 make -j1 -C gdb/doc install DESTDIR=$RPM_BUILD_ROOT