Update 'CARDPUTER CircuitPython/full_display_test.py'

CARDPUTER CircuitPython/full_display_test.py

 while True:
     key = keyb.scan()
     if key == "BACKSP":
-        text = text[:-1]
+        text = text[:-1] 
     elif key == "CTRLD":
         text = "Press CTRL+D to clear text\n\n"
     else:
         text = text+key
-    text_area.text = text
+    text_area.text = text