nobu	2014-04-18 16:55:04 +0900 (Fri, 18 Apr 2014)

  New Revision: 45621

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=45621

  Log:
    string.c: keep code range
    
    * string.c (str_buf_cat): keep code range if possible.

  Modified files:
    trunk/string.c
Index: string.c
===================================================================
--- string.c	(revision 45620)
+++ string.c	(revision 45621)
@@ -2021,7 +2021,7 @@ str_buf_cat(VALUE str, const char *ptr, https://github.com/ruby/ruby/blob/trunk/string.c#L2021
     if (ptr >= RSTRING_PTR(str) && ptr <= RSTRING_END(str)) {
         off = ptr - RSTRING_PTR(str);
     }
-    rb_str_modify(str);
+    str_modify_keep_cr(str);
     if (len == 0) return 0;
     if (STR_EMBED_P(str)) {
 	capa = RSTRING_EMBED_LEN_MAX;

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