Fix missing epoch in -doc subpackage.

rubygem-activesupport.spec

@@ -3,7 +3,7 @@
 Name: rubygem-%{gem_name}
 Epoch: 1
 Version: 5.0.0
-Release: 1%{?dist}
+Release: 2%{?dist}
 Summary: A support libraries and Ruby core extensions extracted from the Rails framework
 Group: Development/Languages
 License: MIT
@@ -53,7 +53,7 @@ time zones, and testing.
 %package doc
 Summary: Documentation for %{name}
 Group: Documentation
-Requires: %{name} = %{version}-%{release}
+Requires: %{name} = %{epoch}:%{version}-%{release}
 BuildArch: noarch
 
 %description doc
@@ -106,6 +106,9 @@ popd
 %doc %{gem_instdir}/README.rdoc
 
 %changelog
+* Wed Jul 27 2016 Vít Ondruch <vondruch@redhat.com> - 1:5.0.0-2
+- Fix missing epoch in -doc subpackage.
+
 * Fri Jul 01 2016 Vít Ondruch <vondruch@redhat.com> - 1:5.0.0-1
 - Update to ActiveSupport 5.0.0.