matz	2008-05-20 16:59:33 +0900 (Tue, 20 May 2008)

  New Revision: 16492

  Modified files:
    trunk/ChangeLog
    trunk/string.c
    trunk/test/ruby/test_array.rb

  Log:
    * string.c (rb_enc_strlen_cr): need to set ENC_CODERANGE_7BIT if
      search_nonascii() fails.    [ruby-dev:34751]
    
    * string.c (rb_str_reverse): preserve coderange info if the
      receiver is 7bit string.
    
    * string.c (rb_str_reverse_bang): ditto.
    
    * string.c (rb_str_reverse_bang): should have called
      single_byte_optimizable before rb_str_modify() that clears
      coderange info.
    
    * string.c (tr_trans): handle single bytes more eagerly.

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi/trunk/string.c?r1=16492&r2=16491&diff_format=u
  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi/trunk/ChangeLog?r1=16492&r2=16491&diff_format=u
  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi/trunk/test/ruby/test_array.rb?r1=16492&r2=16491&diff_format=u