Issue #16968 has been reported by nobu (Nobuyoshi Nakada).

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Feature #16968: Remove `$IGNORECASE` from English.rb
https://bugs.ruby-lang.org/issues/16968

* Author: nobu (Nobuyoshi Nakada)
* Status: Open
* Priority: Normal
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`$=` has been obsolete and has no effect since 1.9.
I believe that we can remove this alias safely.



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