utf8 symbols should be treated as such

core/symbol/encoding_spec.rb

@@ -1,7 +1,26 @@
+# encoding: utf-8
 require File.expand_path('../../../spec_helper', __FILE__)
 
 ruby_version_is "1.9" do
   describe "Symbol#encoding" do
-    it "needs to be reviewed for spec completeness"
+    context "for ASCII symbols" do
+      it "should be US-ASCII" do
+        :foo.encoding.name.should == "US-ASCII"
+      end
+
+      it "should be US-ASCII after converting to string" do
+        :foo.to_s.encoding.name.should == "US-ASCII"
+      end
+    end
+
+    context "for UTF-8 symbols" do
+      it "should be UTF-8" do
+        :åäö.encoding.name.should == "UTF-8"
+      end
+
+      it "should be UTF-8 after converting to string" do
+        :åäö.to_s.encoding.name.should == "UTF-8"
+      end
+    end
   end
 end