Issue #13665 has been reported by sonots (Naotoshi Seo).

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Feature #13665: String#delete_suffix
https://bugs.ruby-lang.org/issues/13665

* Author: sonots (Naotoshi Seo)
* Status: Open
* Priority: Normal
* Assignee: 
* Target version: 
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In https://bugs.ruby-lang.org/issues/12694, we decided to have `String#delete_prefix`.
It would be nice to have `String#delete_suffix` method to delete suffix from a string for symmetry although it can be achieved with `String#chomp` as:

```
class String
  def delete_suffix(substr)
    chomp(substr)
  end
  def delete_suffix!(substr)
    chomp!(substr)
  end
end
```

Any opinions?



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