Minor changes in the docs

doc/Migrating code to new API.md

@@ -1,7 +1,7 @@
 Migrating code written for Arduino JSON v3 to v4
 ================================================
 
-Arduino JSON v4 was a major rewrite of the library, and the API change significantly.
+Arduino JSON v4 was a major rewrite of the library, and the API changed significantly.
 
 ## Includes
 
@@ -14,12 +14,6 @@ Arduino JSON v4 only has one:
 
 	#include <ArduinoJson.h>
 
-Node: the header `src/ArduinoJson.h` is intended to be used within the Arduino IDE, if you're in another environment, you may need to include the following headers:
-
-	#include <ArduinoJson/StaticJsonBuffer.hpp>
-	#include <ArduinoJson/JsonObject.hpp>
-	#include <ArduinoJson/JsonArray.hpp>
-
 ## Namespaces
 
 Arduino JSON v3 had two namespaces:
@@ -27,15 +21,12 @@ Arduino JSON v3 had two namespaces:
 	using namespace ArduinoJson::Parser;
 	using namespace ArduinoJson::Generator;
 
-Arduino JSON v4 only has one:
-
-	using namespace ArduinoJson;
-
-If you include the header `ArduinoJson.h` (recommended if in Arduino IDE), the `using` directivei is already done for you, so you don't have to write it.
+Arduino JSON v4 doesn't require the `using namespace` statement.
+It has a namespace but the `using namespace` is done in the header file.
 
 ## StaticJsonBuffer
 
-Arduino JSON v3 had different memory allocation models for parser:
+Arduino JSON v3 had different memory allocation models for the parser:
 
 	JsonParser<16> parser; // 16 being the capacity in "tokens"
 
@@ -44,18 +35,18 @@ and for the generator:
 	JsonArray<4> array; // 4 being the number of element
 	JsonObject<4> object;
 
-Arduino JSON v4 only has one memory allocation mode:
+Arduino JSON v4 only has one memory allocation model:
 
 	StaticJsonBuffer<128> buffer; // 128 being the capacity in bytes
 
 ## Return values for the parser
 
-Arduino JSON v3 returned `JsonArray` and `JsonObject`:
+Arduino JSON v3 returned value types:
 
 	JsonArray array = parser.parseArray(json);
 	JsonObject object = parser.parseObject(json);
 
-Arduino JSON v4 returns references:
+Arduino JSON v4 returns references types:
 
 	JsonArray& array = buffer.parseArray(json);
 	JsonObject& object = buffer.parseObject(json);
@@ -78,11 +69,11 @@ Note: you don't have to specify the capacity anymore.
 
 ## Printable interface
 
-Arduino JSON v3 used to implement the Printable interface, that allowed that kind of statement:
+Arduino JSON v3 used to implement the Printable interface, which allowed statements like:
 
     Serial.print(array);
 
-Arduino JSON v4 doesn't, so you need to write this:
+But Arduino JSON v4 doesn't, instead you need to write this:
 
 	array.printTo(Serial);