Deprecate taint/trust and related methods, and make the methods no-ops

This removes the related tests, and puts the related specs behind
version guards.  This affects all code in lib, including some
libraries that may want to support older versions of Ruby.

1 files changed, 7 insertions, 5 deletions

diff --git a/spec/ruby/core/string/b_spec.rb b/spec/ruby/core/string/b_spec.rb
index b43cb5393a..b2e3d326ba 100644
--- a/spec/ruby/core/string/b_spec.rb
+++ b/spec/ruby/core/string/b_spec.rb
@@ -13,10 +13,12 @@ describe "String#b" do
     str.should == "こんちには"
   end
 
-  it "copies own tainted/untrusted status to the returning value" do
-    utf_8 = "こんちには".taint.untrust
-    ret = utf_8.b
-    ret.tainted?.should be_true
-    ret.untrusted?.should be_true
+  ruby_version_is ''...'2.7' do
+    it "copies own tainted/untrusted status to the returning value" do
+      utf_8 = "こんちには".taint.untrust
+      ret = utf_8.b
+      ret.tainted?.should be_true
+      ret.untrusted?.should be_true
+    end
   end
 end