Remove and obsolete the flex-doc subpackage (#1915609)

The flex-doc subpackage hasn't contained any documentation for quite a
while.  It is supposed to contain the manual in PDF format, but
`make && make install' does not produce a PDF.  Since info and man pages
are provided in the main package itself, this leaves flex-doc redundant.

This commit removes and obsoletes the flex-doc subpackage.

No Fedora packages are currently dependent on or build-dependent on
flex-doc:

$ dnf repoquery --whatdepends flex-doc

$ dnf repoquery --disablerepo="*" --enablerepo="*-source" --arch=src \
  --whatdepends flex-doc

Therefore, only an "Obsoletes: flex-doc" line is added, with no
accompanying "Provides: flex-doc" line.

flex.spec

@@ -3,7 +3,7 @@
 Summary: A tool for generating scanners (text pattern recognizers)
 Name: flex
 Version: 2.6.4
-Release: 7%{?dist}
+Release: 8%{?dist}
 # parse.c and parse.h are under GPLv3+ with exception which allows
 #	relicensing.  Since flex is shipped under BDS-style license,
 #	let's  assume that the relicensing was done.
@@ -18,6 +18,8 @@ Requires: m4
 BuildRequires: gettext gettext-devel bison m4 help2man gcc gcc-c++ automake libtool
 BuildRequires: make
 
+Obsoletes: flex-doc < 2.6.4-8
+
 %description
 The flex program generates scanners.  Scanners are programs which can
 recognize lexical patterns in text.  Flex takes pairs of regular
@@ -61,12 +63,12 @@ libraries.
 Summary: Static libraries for the flex scanner generator
 # We renamed flex-static to flex-devel in version 2.5.35-15:
 Obsoletes: flex-static < 2.5.35-15
-Provides: flex-static
+Provides: flex-static = %{version}-%{release}
 # We renamed flex-devel to libfl-static in version 2.6.4-6.  This clarifies
 # the nature of the package and brings us in line with naming used by SUSE
 # and Debian:
 Obsoletes: flex-devel < 2.6.4-6
-Provides: flex-devel
+Provides: flex-devel = %{version}-%{release}
 
 %description -n libfl-static
 
@@ -76,14 +78,6 @@ This package contains the static library with default implementations of
 `main' and `yywrap' functions that binaries using flex can choose to
 statically link against instead of implementing their own.
 
-%package doc
-Summary: Documentation for the flex scanner generator
-
-%description doc
-
-This package contains documentation for the flex scanner generator in
-plain text and PDF formats.
-
 %prep
 %setup -q
 %patch0 -p1
@@ -97,7 +91,7 @@ make %{?_smp_mflags}
 rm -rf $RPM_BUILD_ROOT
 make DESTDIR=$RPM_BUILD_ROOT install
 rm -f $RPM_BUILD_ROOT/%{_infodir}/dir
-rm -f $RPM_BUILD_ROOT/%{_pkgdocdir}/{README.cvs,TODO}
+rm -f $RPM_BUILD_ROOT/%{_pkgdocdir}/{README.cvs,TODO,AUTHORS,COPYING,ONEWS}
 # Exclude libtool archives (.la) as per Fedora packaging guidelines
 find %{buildroot} -name '*.la' -delete
 
@@ -138,10 +132,12 @@ echo ============END TESTING===========
 %license COPYING
 %{_libdir}/*.a
 
-%files doc
-%{_pkgdocdir}
-
 %changelog
+* Thu May 06 2021 Arjun Shankar <arjun@redhat.com> - 2.6.4-8
+- Remove and obsolete the flex-doc subpackage; documention is provided in the
+  main package itself
+- Specify versions in "Provides:" lines for flex-static and flex-devel
+
 * Tue Jan 26 2021 Fedora Release Engineering <releng@fedoraproject.org> - 2.6.4-7
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_34_Mass_Rebuild