capitalize/decapitalize docs in stdlib/js

libraries/stdlib/js/src/kotlin/stringsCode.kt

@@ -67,18 +67,20 @@ public actual fun CharSequence.regionMatches(thisOffset: Int, other: CharSequenc
 
 
 /**
- * Returns a copy of this string capitalised if it is not empty or already starting with an uppper case letter, otherwise returns this
+ * Returns a copy of this string having its first letter uppercased, or the original string,
+ * if it's empty or already starts with an upper case letter.
  *
- * @includeFunctionBody ../../test/StringTest.kt capitalize
+ * @sample samples.text.Strings.capitalize
  */
 public actual fun String.capitalize(): String {
     return if (isNotEmpty()) substring(0, 1).toUpperCase() + substring(1) else this
 }
 
 /**
- * Returns a copy of this string with the first letter lower case if it is not empty or already starting with a lower case letter, otherwise returns this
+ * Returns a copy of this string having its first letter lowercased, or the original string,
+ * if it's empty or already starts with a lower case letter.
  *
- * @includeFunctionBody ../../test/StringTest.kt decapitalize
+ * @sample samples.text.Strings.decapitalize
  */
 public actual fun String.decapitalize(): String {
     return if (isNotEmpty()) substring(0, 1).toLowerCase() + substring(1) else this