fix typo in process.env invalid accessor error

Author: moritzraho

src/node_env_var.cc

@@ -445,7 +445,7 @@ static void EnvDefiner(Local<Name> property,
     // we don't accept a getter/setter in 'process.env'
     THROW_ERR_INVALID_OBJECT_DEFINE_PROPERTY(env,
                              "'process.env' does not accept an"
-                                             "accessor(getter/setter)"
+                                             " accessor(getter/setter)"
                                              " descriptor");
   } else {
     THROW_ERR_INVALID_OBJECT_DEFINE_PROPERTY(env,

test/parallel/test-process-env-ignore-getter-setter.js

@@ -33,7 +33,7 @@ assert.throws(
   {
     code: 'ERR_INVALID_OBJECT_DEFINE_PROPERTY',
     name: 'TypeError',
-    message: '\'process.env\' does not accept an' +
+    message: '\'process.env\' does not accept an ' +
         'accessor(getter/setter) descriptor'
   }
 );