Add map() documentation sample

* docs: add map() sample
* docs: add samples for Map and CharSequence
* docs: add another sample for Maps.map()

libraries/stdlib/common/src/generated/_Maps.kt

@@ -58,6 +58,8 @@ public inline fun <K, V, R, C : MutableCollection<in R>> Map<out K, V>.flatMapTo
 /**
  * Returns a list containing the results of applying the given [transform] function
  * to each entry in the original map.
+ * 
+ * @sample samples.collections.Maps.Transformations.mapToList
  */
 public inline fun <K, V, R> Map<out K, V>.map(transform: (Map.Entry<K, V>) -> R): List<R> {
     return mapTo(ArrayList<R>(size), transform)