Update ICU to 58.1

source/data/translit/tr_Title.txt

Index: source/data/translit/tr_Title.txt
diff --git a/source/data/translit/tr_Title.txt b/source/data/translit/tr_Title.txt
index 541f908a1e709e7437166a01534cfae4011cf842..745c5b8f9152c46be0772e9512c1248150476588 100644
--- a/source/data/translit/tr_Title.txt
+++ b/source/data/translit/tr_Title.txt
@@ -1,14 +1,17 @@
-# ***************************************************************************
-# *
-# *  Copyright (C) 2004-2015, International Business Machines
-# *  Corporation; Unicode, Inc.; and others.  All Rights Reserved.
-# *
-# ***************************************************************************
+# © 2016 and later: Unicode, Inc. and others.
+# License & terms of use: http://www.unicode.org/copyright.html#License
+#
 # File: tr_Title.txt
-# Generated from CLDR 
+# Generated from CLDR
 #
+
+# I and i-dotless; I-dot and i are case pairs in Turkish and Azeri
+# Make any string of letters after a cased letter be lower, with rules for i
 [:cased:] [:case-ignorable:]* { İ → i;
 [:cased:] [:case-ignorable:]* { I → ı;
 [:cased:] [:case-ignorable:]* { (.) → &Any-Lower($1) ;
+# Otherwise all lowercase go to upper (titlecase stay as is)
 i→İ ;
 ([:Lowercase:]) → &Any-Upper($1) ;
+# do later I([^[:ccc=Not_Reordered:][:ccc=Above:]]*)\u0307 → i$1 ;
+