KT-20357: Add samples for filter functions

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

@@ -386,6 +386,8 @@ public inline fun String.filter(predicate: (Char) -> Boolean): String {
  * Returns a char sequence containing only those characters from the original char sequence that match the given [predicate].
  * @param [predicate] function that takes the index of a character and the character itself
  * and returns the result of predicate evaluation on the character.
+ * 
+ * @sample samples.collections.Collections.Filtering.filterIndexed
  */
 public inline fun CharSequence.filterIndexed(predicate: (index: Int, Char) -> Boolean): CharSequence {
     return filterIndexedTo(StringBuilder(), predicate)
@@ -395,6 +397,8 @@ public inline fun CharSequence.filterIndexed(predicate: (index: Int, Char) -> Bo
  * Returns a string containing only those characters from the original string that match the given [predicate].
  * @param [predicate] function that takes the index of a character and the character itself
  * and returns the result of predicate evaluation on the character.
+ * 
+ * @sample samples.collections.Collections.Filtering.filterIndexed
  */
 public inline fun String.filterIndexed(predicate: (index: Int, Char) -> Boolean): String {
     return filterIndexedTo(StringBuilder(), predicate).toString()
@@ -404,6 +408,8 @@ public inline fun String.filterIndexed(predicate: (index: Int, Char) -> Boolean)
  * Appends all characters matching the given [predicate] to the given [destination].
  * @param [predicate] function that takes the index of a character and the character itself
  * and returns the result of predicate evaluation on the character.
+ * 
+ * @sample samples.collections.Collections.Filtering.filterIndexedTo
  */
 public inline fun <C : Appendable> CharSequence.filterIndexedTo(destination: C, predicate: (index: Int, Char) -> Boolean): C {
     forEachIndexed { index, element ->
@@ -432,6 +438,8 @@ public inline fun String.filterNot(predicate: (Char) -> Boolean): String {
 
 /**
  * Appends all characters not matching the given [predicate] to the given [destination].
+ * 
+ * @sample samples.collections.Collections.Filtering.filterTo
  */
 public inline fun <C : Appendable> CharSequence.filterNotTo(destination: C, predicate: (Char) -> Boolean): C {
     for (element in this) if (!predicate(element)) destination.append(element)
@@ -440,6 +448,8 @@ public inline fun <C : Appendable> CharSequence.filterNotTo(destination: C, pred
 
 /**
  * Appends all characters matching the given [predicate] to the given [destination].
+ * 
+ * @sample samples.collections.Collections.Filtering.filterTo
  */
 public inline fun <C : Appendable> CharSequence.filterTo(destination: C, predicate: (Char) -> Boolean): C {
     for (index in 0 until length) {