Update dx.md

Author: oblomov-dev

docs/advanced/technical/dx.md

@@ -137,15 +137,15 @@ Logic events...
 ```abap
 REPORT zre_app_alv.
 
-DATA: event TYPE string.
+DATA event TYPE string.
 CALL FUNCTION 'POPUP_TO_CONFIRM'
   EXPORTING
     titlebar      = 'Title'
     text_question = 'Do you have a great day?'
   IMPORTING
     answer        = event.
 
-CASE  event.
+CASE event.
   WHEN '1'.
     MESSAGE `the result is YES` TYPE 'I'.
   WHEN '2'.