Conditionaly disable `BR: rubygem(shoulda-context)`.

This helps to cut dependency chain. Only the CLI test cases are disabled
due to this and they are not our focus, because we ship rubygem-coderay
just as an dependency of rubygem-rspec-core.

Resolves: rhbz#1937981

rubygem-coderay.spec

@@ -1,5 +1,7 @@
 %global gem_name coderay
 
+%bcond_with shoulda
+
 Name: rubygem-%{gem_name}
 Version: 1.1.3
 Release: 2%{?dist}
@@ -18,7 +20,9 @@ BuildRequires: rubygems-devel
 BuildRequires: ruby >= 1.8.6
 BuildRequires: rubygem(test-unit)
 BuildRequires: rubygem(rspec)
+%if %{with shoulda}
 BuildRequires: rubygem(shoulda-context)
+%endif
 BuildArch: noarch
 
 %description
@@ -79,7 +83,9 @@ ruby ./test/functional/suite.rb
 ruby ./test/functional/for_redcloth.rb
 ruby ./test/unit/suite.rb
 # This test depends on rubygem-shoulda-context.
+%if %{with shoulda}
 ruby ./test/executable/suite.rb
+%endif
 rspec spec
 popd
 
@@ -97,6 +103,10 @@ popd
 %doc %{gem_instdir}/README_INDEX.rdoc
 
 %changelog
+* Mon May 24 2021 Vít Ondruch <vondruch@redhat.com> - 1.1.3-2
+- Conditionaly disable `BR: rubygem(shoulda-context)`.
+  Resolves: rhbz#1937981
+
 * Fri Apr 16 2021 Mohan Boddu <mboddu@redhat.com> - 1.1.3-2
 - Rebuilt for RHEL 9 BETA on Apr 15th 2021. Related: rhbz#1947937