abbreviate Arduino 101 CS pin comments

examples/CopyFromSD/CopyFromSD.ino

 
 const int SDchipSelect = 4;    // Audio Shield has SD card CS on pin 10
 const int FlashChipSelect = 6; // digital pin for flash chip CS pin
-// Uncomment this line if using the built-in SPI Flash device
-// on an Arduino 101 board
-//const int FlashChipSelect = 21;
+//const int FlashChipSelect = 21; // Arduino 101 built-in SPI Flash
 
 void setup() {
   //uncomment these if using Teensy audio shield

examples/CopyFromSerial/CopyFromSerial.ino

 #define MISO              12
 #define SCK               14
 #define CSPIN              6
-// Uncomment this line if using the built-in SPI Flash device
-// on an Arduino 101 board
-//#define CSPIN            21
+//#define CSPIN           21  // Arduino 101 built-in SPI Flash
 
 void setup(){
   Serial.begin(9600);  //Teensy serial is always at full USB speed and buffered... the baud rate here is required but ignored

examples/EraseEverything/EraseEverything.ino

 #include <SPI.h>
 
 const int FlashChipSelect = 6; // digital pin for flash chip CS pin
-// Uncomment this line if using the built-in SPI Flash device
-// on an Arduino 101 board
-//const int FlashChipSelect = 21;
+//const int FlashChipSelect = 21; // Arduino 101 built-in SPI Flash
 
 SerialFlashFile file;
 

examples/ListFiles/ListFiles.ino

 #include <SPI.h>
 
 const int FlashChipSelect = 6; // digital pin for flash chip CS pin
-// Uncomment this line if using the built-in SPI Flash device
-// on an Arduino 101 board
-//const int FlashChipSelect = 21;
+//const int FlashChipSelect = 21; // Arduino 101 built-in SPI Flash
 
 void setup() {
   //uncomment these if using Teensy audio shield

examples/MP3Player/MP3Player.ino

 
 #define PROP_AMP_ENABLE    5
 #define FLASH_CHIP_SELECT  6
-// Uncomment this line if using the built-in SPI Flash device
-// on an Arduino 101 board
-//#define FLASH_CHIP_SELECT 21
+//#define FLASH_CHIP_SELECT 21  // Arduino 101 built-in SPI Flash
 
 void setup() {
   Serial.begin(9600);

examples/RawHardwareTest/RawHardwareTest.ino

 #include <SPI.h>
 
 const int FlashChipSelect = 6; // digital pin for flash chip CS pin
-// Uncomment this line if using the built-in SPI Flash device
-// on an Arduino 101 board
-//const int FlashChipSelect = 21;
+//const int FlashChipSelect = 21; // Arduino 101 built-in SPI Flash
 
 SerialFlashFile file;