for backward compatibility - handle already encoded id

lib/gitlab/client.rb

@@ -40,7 +40,7 @@ def inspect
     end
 
     def url_encode(s)
-      ERB::Util.url_encode(s)
+      ERB::Util.url_encode(s.gsub('%2F','/'))
     end
 
     private

spec/gitlab/cli_spec.rb

@@ -108,6 +108,13 @@
     end
 
     context "fetch project with namespace/repo" do
+      it "should allow already encoded delimiter" do
+        stub_get("/projects/gitlab-org%2Fgitlab-ce", "project")
+        args = ['project', 'gitlab-org%2Fgitlab-ce']
+        @output = capture_output { Gitlab::CLI.start(args) }
+        expect(@output).to include('id')
+      end
+
       it "should encode delimiter" do
         stub_get("/projects/gitlab-org%2Fgitlab-ce", "project")
         args = ['project', 'gitlab-org/gitlab-ce']