fixed deprecation messages outside of @deprecated tags

src/org/rascalmpl/library/List.rsc

@@ -96,9 +96,7 @@ dup([3, 1, 5, 3, 1, 7, 1, 2]);
 list[&T] dup(list[&T] lst) 
   = ([] | (ix in it) ? it : it + [ix] | &T ix <- lst);
 
-@deprecated{
-Use a list index instead
-}
+@deprecated Use a list index instead}
 @javaClass{org.rascalmpl.library.Prelude}
 java &T elementAt(list[&T] lst, int index); 
 
@@ -481,7 +479,8 @@ push("eagle", ["zebra", "elephant", "snake", "owl"]);
 list[&T] push(&T elem, list[&T] lst) = [elem] + lst;
 
 
-@synopsis{Apply a function to successive elements of list and combine the results (__deprecated__).}
+@synopsis{Apply a function to successive elements of list and combine the results.}
+@deprecated{This function is deprecated. Use a reducer expression instead, like `(init | f(it, e) | e <- lst)`.}
 @description{
 Apply the function `fn` to successive elements of list `lst` starting with `unit`.
 }
@@ -492,14 +491,6 @@ int add(int x, int y) { return x + y; }
 reducer([10, 20, 30, 40], add, 0); 
 ```
 }
-@benefits{
-
-}
-@pitfalls{
-:::warning
-This function is *deprecated*, use a reducer expression instead. E.g. `(init | f(it, e) | e <- lst)`.
-:::
-}
 &T reducer(list[&T] lst, &T (&T, &T) fn, &T unit)
 {
   &T result = unit;