Update ICU to 58.1

source/data/translit/el_Title.txt

Index: source/data/translit/el_Title.txt
diff --git a/source/data/translit/el_Title.txt b/source/data/translit/el_Title.txt
index 748b32e85e2d343dada5cf735183b3e18bb2ff7f..95b4fe95b7e4223af46706d52a32bdffacc38574 100644
--- a/source/data/translit/el_Title.txt
+++ b/source/data/translit/el_Title.txt
@@ -1,15 +1,18 @@
-# ***************************************************************************
-# *
-# *  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: el_Title.txt
-# Generated from CLDR 
+# Generated from CLDR
 #
+
 ::NFD();
+# Remove \0301 following Greek, with possible intervening 0308 marks.
+# [[:Greek:] & [:Ll:]] [\u0308]? { \u0301 → ;
+# Make any string of letters after a cased letter be lower, with rules for sigma
 [:cased:] [:case-ignorable:]* { Σ } [:case-ignorable:]* [:cased:] → σ;
 [:cased:] [:case-ignorable:]* { Σ → ς;
 [:cased:] [:case-ignorable:]* { (.) → &Any-Lower($1) ;
+# Otherwise all lowercase go to upper (titlecase stay as is)
 ([:Lowercase:]) → &Any-Title($1) ;
 ::NFC();
+