hsbt	2017-08-29 19:22:47 +0900 (Tue, 29 Aug 2017)

  New Revision: 59683

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=59683

  Log:
    Partly reverted r59642. Because IO#close is idempotent since Ruby 2.3.
    
      Reported by Eric Wong. Thank you.

  Modified files:
    trunk/lib/csv.rb
Index: lib/csv.rb
===================================================================
--- lib/csv.rb	(revision 59682)
+++ lib/csv.rb	(revision 59683)
@@ -1288,7 +1288,7 @@ class CSV https://github.com/ruby/ruby/blob/trunk/lib/csv.rb#L1288
       begin
         yield csv
       ensure
-        csv.closed? || csv.close
+        csv.close
       end
     else
       csv

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