[ruby-dev:50460] [Ruby trunk Bug#14427] Backport r61469

Issue #14427 has been reported by znz (Kazuhiro NISHIYAMA).

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Bug #14427: Backport r61469
https://bugs.ruby-lang.org/issues/14427

* Author: znz (Kazuhiro NISHIYAMA)
* Status: Closed
* Priority: Normal
* Assignee: 
* Target version: 
* ruby -v: 2.5.0
* Backport: 2.3: DONTNEED, 2.4: DONTNEED, 2.5: REQUIRED
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Please backport r61469 to ruby_2_5 branch.

2.5.0:

```
% rbenv exec irb -r irb/completion --simple-prompt
>> {foo: 1}.fetch(:fooo)
Traceback (most recent call last):
        3: from .../bin/irb:11:in `<main>'
        2: from (irb):1
        1: from (irb):1:in `fetch'
KeyError (key not found: :fooo
Did you mean?  :foo)
```

trunk:

```
>> {foo: 1}.fetch(:fooo)
Traceback (most recent call last):
        3: from .../bin/irb:11:in `<main>'
        2: from (irb):1
        1: from (irb):1:in `fetch'
KeyError (key not found: :fooo)
Did you mean?  :foo
```



-- 
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