Move spec/rubyspec to spec/ruby for consistency

* Other ruby implementations use the spec/ruby directory.
  [Misc #13792] [ruby-core:82287]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59979 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

spec/ruby/core/env/clear_spec.rb

@@ -0,0 +1,20 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+
+describe "ENV.clear" do
+  it "deletes all environment variables" do
+    orig = ENV.to_hash
+    begin
+      ENV.clear
+
+      # This used 'env' the helper before. That shells out to 'env' which
+      # itself sets up certain environment variables before it runs, because
+      # the shell sets them up before it runs any command.
+      #
+      # Thusly, you can ONLY test this by asking through ENV itself.
+      ENV.size.should == 0
+    ensure
+      ENV.replace orig
+    end
+  end
+
+end