Commonize Char.titlecaseChar() and Char.titlecase() #KT-44369

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

@@ -0,0 +1,21 @@
+/*
+ * Copyright 2010-2021 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package kotlin.text
+
+//
+// NOTE: THIS FILE IS AUTO-GENERATED by the GenerateUnicodeData.kt
+// See: https://github.com/JetBrains/kotlin/tree/master/libraries/stdlib
+//
+
+// 10 mappings totally
+@OptIn(ExperimentalStdlibApi::class)
+internal fun Char.titlecaseImpl(): String {
+    val uppercase = uppercase()
+    if (uppercase.length > 1) {
+        return if (this == '\u0149') uppercase else uppercase[0] + uppercase.substring(1).lowercase()
+    }
+    return titlecaseChar().toString()
+}