All: Update locale codes (Part 2) (#76)

- Update language codes and add comments.
- Correct `en_US` translations.
- Some whitespace clean-up (mainly EOL sanitation).

Reviewed-on: #76
Co-authored-by: Andrew <dent.ace@gmail.com>
Co-committed-by: Andrew <dent.ace@gmail.com>

programs/demos/timer/trunk/timer.asm

@@ -16,7 +16,7 @@ use32
     dd     0x1000           ; esp
     dd     0x0 , 0x0        ; I_Param , I_Icon
 
-include 'lang.inc'
+include 'lang.inc' ; Language support for locales: ru_RU (CP866), en_US.
 include '..\..\..\macros.inc'
 
 START:                      ; start of execution
@@ -139,7 +139,7 @@ draw_window:
 
 if lang eq ru_RU
     title   db   '<27><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>',0
-else
+else ; Default to en_US
     title   db   'TIMER',0
 end if