akr	2017-02-09 23:28:27 +0900 (Thu, 09 Feb 2017)

  New Revision: 57584

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=57584

  Log:
    [DOC] Update an obsolete example for slice_before.
    
    The argument for Enumerable#slice_before is is removed at Ruby 2.3.
    
    Reported by Shyouhei Urabe.  [Bug #13202]

  Modified files:
    trunk/enum.c
Index: enum.c
===================================================================
--- enum.c	(revision 57583)
+++ enum.c	(revision 57584)
@@ -3213,9 +3213,10 @@ slicebefore_i(RB_BLOCK_CALL_FUNC_ARGLIST https://github.com/ruby/ruby/blob/trunk/enum.c#L3213
  *
  *    # split mails in mbox (slice before Unix From line after an empty line)
  *    open("mbox") { |f|
- *      f.slice_before(emp: true) { |line, h|
- *        prevemp = h[:emp]
- *        h[:emp] = line == "\n"
+ *      emp = true
+ *      f.slice_before { |line|
+ *        prevemp = emp
+ *        emp = line == "\n"
  *        prevemp && line.start_with?("From ")
  *      }.each { |mail|
  *        mail.pop if mail.last == "\n"

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