Update ICU to 58.1

source/i18n/collationruleparser.cpp

Index: source/i18n/collationruleparser.cpp
diff --git a/source/i18n/collationruleparser.cpp b/source/i18n/collationruleparser.cpp
index 2d2e25fcb0e1d48ee3ef4c57fdfe7a35d9ac364b..ea3ea66bc08cf5ea32bd38c91ba5dafb4a82405f 100644
--- a/source/i18n/collationruleparser.cpp
+++ b/source/i18n/collationruleparser.cpp
@@ -1,3 +1,5 @@
+// Copyright (C) 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
 /*
 *******************************************************************************
 * Copyright (C) 2013-2015, International Business Machines
@@ -788,7 +790,7 @@ CollationRuleParser::readWords(int32_t i, UnicodeString &raw) const {
             return i;
         }
         if(PatternProps::isWhiteSpace(c)) {
-            raw.append(0x20);
+            raw.append(sp);
             i = skipWhiteSpace(i + 1);
         } else {
             raw.append(c);