Migrate stdlib, tests and samples to new case conversion api

libraries/stdlib/jvm/src/kotlin/text/StringsJVM.kt

@@ -717,6 +717,7 @@ public inline fun String.toPattern(flags: Int = 0): java.util.regex.Pattern {
 @Deprecated("Use replaceFirstChar instead.", ReplaceWith("replaceFirstChar { if (it.isLowerCase()) it.titlecase(Locale.getDefault()) else it.toString() }", "java.util.Locale"))
 @DeprecatedSinceKotlin(warningSince = "1.5")
 public actual fun String.capitalize(): String {
+    @Suppress("DEPRECATION")
     return capitalize(Locale.getDefault())
 }
 
@@ -759,6 +760,7 @@ public fun String.capitalize(locale: Locale): String {
 @Deprecated("Use replaceFirstChar instead.", ReplaceWith("replaceFirstChar { it.lowercase(Locale.getDefault()) }", "java.util.Locale"))
 @DeprecatedSinceKotlin(warningSince = "1.5")
 public actual fun String.decapitalize(): String {
+    @Suppress("DEPRECATION")
     return if (isNotEmpty() && !this[0].isLowerCase()) substring(0, 1).toLowerCase() + substring(1) else this
 }
 

libraries/stdlib/jvm/test/text/StringJVMTest.kt

@@ -74,6 +74,7 @@ class StringJVMTest {
         assertEquals("UTF-32BE", Charsets.UTF_32BE.name())
     }
 
+    @Suppress("DEPRECATION")
     @Test fun capitalize() {
         fun testCapitalize(expected: String, string: String) {
             assertEquals(expected, string.capitalize())
@@ -90,6 +91,7 @@ class StringJVMTest {
 
     @Test fun decapitalize() {
         fun testDecapitalize(expected: String, string: String) {
+            @Suppress("DEPRECATION")
             assertEquals(expected, string.decapitalize())
             assertEquals(expected, string.replaceFirstChar { it.lowercase(Locale.getDefault()) })
         }
@@ -98,6 +100,7 @@ class StringJVMTest {
         testDecapitalize("dzdzdz", "Dzdzdz")
     }
 
+    @Suppress("DEPRECATION")
     @Test fun capitalizeLocale() {
         fun testCapitalizeLocale(expected: String, string: String, locale: Locale) {
             assertEquals(expected, string.capitalize(locale))
@@ -122,6 +125,7 @@ class StringJVMTest {
 
     @Test fun decapitalizeLocale() {
         fun testDecapitalizeLocale(expected: String, string: String, locale: Locale) {
+            @Suppress("DEPRECATION")
             assertEquals(expected, string.decapitalize(locale))
             assertEquals(expected, string.replaceFirstChar { it.lowercase(locale) })
         }