[ruby-core:96470] [Ruby master Feature#16451] Special terniary operators for methods ending in `?`

Issue #16451 has been reported by myxoh (Nicolas Klein).

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Feature #16451: Special terniary operators for methods ending in `?`
https://bugs.ruby-lang.org/issues/16451

* Author: myxoh (Nicolas Klein)
* Status: Open
* Priority: Normal
* Assignee: 
* Target version: 
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**Feature proposal**

When a method ends in `?` we should be able to skip the `?` in the ternary operator

So for example you'd be able to do

`question_method? true_statement : false_statement`

This shouldn't interfere with implementations as currently this fails to parse.

```
def normal_method
  true
end
```

```
def question_method?
  false
end
```

Ternary operator:

```
question_method? 'was true' : 'was false'
=> 'was false'

normal_method? 'was true' : 'was false'
=> method not found normal_method?

normal_method ? 'was true' : 'was false'
=> 'was true'
```

and finally to preserve currently compatibility

```
question_method? ? 'was true' : 'was false'
=> 'was true'
```



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