Simplify comments to be more concise and student-like

- Removed verbose explanations
- Made comments shorter and more casual
- Focus on key concepts rather than formal descriptions

01/DMux.hdl

@@ -12,7 +12,7 @@ CHIP DMux {
     OUT a, b;
 
     PARTS:
-    // DMux(in,sel) -> a = And(in, Not(sel)), b = And(in, sel)
+    // sel=0 sends to a, sel=1 sends to b
     Not(in=sel, out=tmp);
     And(a=in, b=tmp, out=a);
     And(a=in, b=sel, out=b);