Update Readme.md

Small modifications to properly format code parts.

Author: Pablo2048

examples/ESP32_TFT_eSPI_Slider/Readme.md

@@ -2,33 +2,43 @@
 
 This example has the screen set to 320x480 (ILI9488), change this by altering the following lines in the main ino file:
 
+```C
 int screenWidth = 480;
 int screenHeight = 320;
+```
 
 ## Backlight
 
 Change pin 32 to your preferred backlight pin using a PNP transistor (2N3906) or remove the following code and connect directly to +ve:
 
+```C
   ledcSetup(10, 5000/*freq*/, 10 /*resolution*/);
   ledcAttachPin(32, 10);
   analogReadResolution(10);
   ledcWrite(10,768);
+```
 
 ## Theme selection
 
 Change the following to change the theme:
 
+```C
   lv_theme_t * th = lv_theme_night_init(210, NULL);     //Set a HUE value and a Font for the Night Theme
   lv_theme_set_current(th);
+```
 
 ## Calibration
 
 This is using the bodmer tft_espi driver for touch. To correctly set the calibration load the calibration sketch and replace the following with your values:
 
-  uint16_t calData[5] = { 275, 3620, 264, 3532, 1 };
+```C
+uint16_t calData[5] = { 275, 3620, 264, 3532, 1 };
+```
 
-## Scrreen rotation
+## Screen rotation
 
 Check the following if you need to alter your screen rotation:
 
+```C
   tft.setRotation(3);
+```