Exclude test.ru shebang from being mangled.

rubygem-rack.spec

@@ -1,7 +1,3 @@
-# Avoid shebang check to a testing file.
-# https://bugzilla.redhat.com/show_bug.cgi?id=1541318
-%undefine __brp_mangle_shebangs
-
 %global gem_name rack
 
 # There is circular dependency between thin and rack.
@@ -11,7 +7,7 @@ Name: rubygem-%{gem_name}
 Version: 2.0.4
 # Introduce Epoch (related to bug 552972)
 Epoch:  1
-Release: 1%{?dist}
+Release: 2%{?dist}
 Summary: A modular Ruby webserver interface
 Group: Development/Languages
 # lib/rack/show_{status,exceptions}.rb contains snippets from Django under BSD license.
@@ -30,6 +26,8 @@ BuildRequires: rubygem(thin)
 %endif
 BuildArch: noarch
 
+%global __brp_mangle_shebangs_exclude_from ^%{gem_instdir}/test/cgi/test.ru$
+
 %description
 Rack provides a minimal, modular and adaptable interface for developing
 web applications in Ruby.  By wrapping HTTP requests and responses in
@@ -119,6 +117,9 @@ popd
 %doc %{gem_instdir}/contrib
 
 %changelog
+* Thu Feb 15 2018 Vít Ondruch <vondruch@redhat.com> - 1:2.0.4-2
+- Exclude test.ru shebang from being mangled.
+
 * Tue Feb 13 2018 Jun Aruga <jaruga@redhat.com> - 1:2.0.4-1
 - Update to Rack 2.0.4.