why3: removed unnecessary newlines

assets/why3/exercises/ex1_eucl_div.mlw

@@ -26,4 +26,4 @@ module Division
     done;
     q
 
-end
+end

assets/why3/exercises/ex2_fact.mlw

@@ -46,4 +46,4 @@ module FactLoop
     done;
     r
 
-end
+end

assets/why3/exercises/ex3_two_way.mlw

@@ -48,4 +48,4 @@ module TwoWaySort
       end
     done
 
-end
+end