Update ICU to 58.1

source/data/translit/ja_Latn_ru.txt

Index: source/data/translit/ja_Latn_ru.txt
diff --git a/source/data/translit/ja_Latn_ru.txt b/source/data/translit/ja_Latn_ru.txt
index 6a5f3fb3af01096f3009802f8d348c36a923fd6f..fc2bf525a2ee32c5fe23d9e4e8ea61fcaa88eaa2 100644
--- a/source/data/translit/ja_Latn_ru.txt
+++ b/source/data/translit/ja_Latn_ru.txt
@@ -1,29 +1,67 @@
-# ***************************************************************************
-# *
-# *  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: ja_Latn_ru.txt
-# Generated from CLDR 
+# Generated from CLDR
+#
+
+# Japanese (Rōmaji) to Russian (Cyrillic) Polivanov transliteration for ICU.
+# Can be run in sequence after e.g. Katakana-Latin.
+#
+# These rules cannot be used to target Bulgarian, Serbian, Tajik, or Ukrainian.
+#
+# TODO: Cyrillization needs to respect morpheme/Kanji boundaries.
+# 中井 becomes Накаи, but 北海道 becomes Хоккайдо.  We need boundary
+# markup in the input in order to do that properly.
 #
 ::NFD(NFC);
 ::[:Latin:] Lower();
+#
+#
 $lengthMarker = [\u0302\u0304];
+#
+#
+# Delete apostrophes.  Apostrophes after "n" are consumed below.
 \' → ;
+#
+#
+# Turn long /e:/ into diphthong /ei/.
+# Note that /ei/ across a morpheme boundary (e.g. 武井 Takei) becomes эи.
 e $lengthMarker → эй ;
+#
+#
+# Turn long /i:/ into two vowels /ii/.
 i $lengthMarker → | i i ;
+#
+#
+# Ignore vowel length everywhere else.
 $lengthMarker → ;
+#
+#
+# Vowels.
+#
+# TODO(mjansche): Enable diphthongs once we have Kanji boundaries.
+## ai → ай ;
 a  → а ;
 i\~e → | ye ;
 i  → и ;
 u\~ → в ;  # ウィ etc.
+#
+## ui → уй ;
 u  → у ;
 e  → э ;
 o  → о ;
+#
+#
+# Consonants.
+#
 k → к ;
+#
+#
 sh → | sy ;
 s → с ;
+#
+#
 ch     → | ty ;
 c } ch → t ;
 te\~   → | t ;   # テュ
@@ -31,25 +69,45 @@ to\~   → | t ;   # トゥ
 tsu\~  → | ts ;  # ツァ, ツィ, etc.
 ts → ц ;
 t  → т ;
+#
+#
 \~tsu → | tsu ;
+#
+#
 n } [bpm] → м ;  # 群馬 → Гумма
 n\' → нъ ;
 n → н ;
+#
+#
 h → х ;
 fu\~ → | f ;  # フュ
 f → ф ;
+#
+#
 m → м ;
+#
+#
 ya → я ;
 yi → и ;  # Added for convenience, after sh, ch, j.
 yu → ю ;
 ye → е ;  # ?? unobserved
 yo → ё ;
+#
+#
 r → р ;
+#
+#
 wa → ва ;
 w → ;
+#
+#
 g → г ;
+#
+#
 j → | zy ;
 z → дз ;
+#
+#
 de\~  → | d ;  # デュ
 dji\~ → | z ;  # ヂャ, ヂュ, etc.
 dj    → | j ;  # ヂ
@@ -57,8 +115,15 @@ do\~  → | d ;  # ドゥ
 dzu\~ → | z ;  # ヅァ, ヅィ, etc.
 dz    → | z ;  # ヅ
 d → д ;
+#
+#
 b → б ;
 vu\~ → | v ;  # ヴァ, etc.
 v → в ;  # ?? unobserved
+#
+#
 p → п ;
+#
+#
 ::NFC(NFD);
+