From: Yusuke Endoh <redmine@...>
Date: 2009-08-18T23:23:57+09:00
Subject: [ruby-core:24966] [Bug #1943](Rejected) unexpected behavior of tr with unicode strings

Issue #1943 has been updated by Yusuke Endoh.

Status changed from Open to Rejected

Not a bug.
By design, String#tr handles some meta characters including '-' (ASCII 45).
What you are doing is similar to:

  "F@@@@F".tr("ABCDEF", "abcd-a") #=> "d@@@@d"
  "F".tr("F", "a")                #=> "a@@@@a"

You should use escape character:

  "F@@@@F".tr("ABCDEF", "abcd\-a") #=> "a@@@@a"


BTW, in a discussion with nurse, we noticed that empty range (such as "d-a")
seems to cause unexpected behavior.  I'll register a separate ticket.

-- 
Yusuke ENDOH <mame@tsg.ne.jp>
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