stub nt.device_encoding to get interactive help to work on windows

Author: timfel

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/modules/NtModuleBuiltins.java

@@ -48,13 +48,15 @@
 import java.util.List;
 
 import com.oracle.graal.python.annotations.ArgumentClinic;
+import com.oracle.graal.python.annotations.ArgumentClinic.ClinicConversion;
 import com.oracle.graal.python.builtins.Builtin;
 import com.oracle.graal.python.builtins.CoreFunctions;
 import com.oracle.graal.python.builtins.Python3Core;
 import com.oracle.graal.python.builtins.PythonBuiltins;
 import com.oracle.graal.python.builtins.PythonOS;
 import com.oracle.graal.python.builtins.modules.PosixModuleBuiltins.PathConversionNode;
 import com.oracle.graal.python.builtins.modules.PosixModuleBuiltins.PosixPath;
+import com.oracle.graal.python.builtins.objects.PNone;
 import com.oracle.graal.python.nodes.function.PythonBuiltinBaseNode;
 import com.oracle.graal.python.nodes.function.builtins.PythonUnaryClinicBuiltinNode;
 import com.oracle.graal.python.nodes.function.builtins.clinic.ArgumentClinicProvider;
@@ -134,4 +136,21 @@ protected ArgumentClinicProvider getArgumentClinic() {
             return NtModuleBuiltinsClinicProviders.PathSplitRootNodeClinicProviderGen.INSTANCE;
         }
     }
+
+    @Builtin(name = "device_encoding", minNumOfPositionalArgs = 1, parameterNames = {"fd"})
+    @ArgumentClinic(name = "fd", conversion = ClinicConversion.Int)
+    @GenerateNodeFactory
+    abstract static class DeviceEncodingNode extends PythonUnaryClinicBuiltinNode {
+        @Specialization
+        @TruffleBoundary
+        Object deviceEncoding(@SuppressWarnings("unused") int fd) {
+            // TODO should actually figure this out
+            return PNone.NONE;
+        }
+
+        @Override
+        protected ArgumentClinicProvider getArgumentClinic() {
+            return NtModuleBuiltinsClinicProviders.PathSplitRootNodeClinicProviderGen.INSTANCE;
+        }
+    }
 }