Update README.md

README.md

@@ -117,7 +117,7 @@ An `_id` field will be automatically generated by NeDB. It's a 16-characters alp
 Field names cannot begin by '$' or contain a '.'.
 
 ```javascript
-var document = { hello: 'world'
+var doc = { hello: 'world'
                , n: 5
                , today: new Date()
                , nedbIsAwesome: true
@@ -127,7 +127,7 @@ var document = { hello: 'world'
                , infos: { name: 'nedb' }
                };
 
-db.insert(document, function (err, newDoc) {   // Callback is optional
+db.insert(doc, function (err, newDoc) {   // Callback is optional
   // newDoc is the newly inserted document, including its _id
   // newDoc has no key called notToBeSaved since its value was undefined
 });