Issue #10934 has been reported by Hiroshi SHIBATA.

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Bug #10934: Backport r49017
https://bugs.ruby-lang.org/issues/10934

* Author: Hiroshi SHIBATA
* Status: Closed
* Priority: Normal
* Assignee: 
* ruby -v: 2.2.1
* Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN, 2.2: REQUIRED
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fix typo. 



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