From: ug.tiser@...
Date: 2018-10-23T11:17:16+00:00
Subject: [ruby-core:89529] [Ruby trunk Bug#15244] Method #extname return empty string if filename is dot ('.')

Issue #15244 has been reported by TiSer (Sergey TiSer).

----------------------------------------
Bug #15244: Method #extname return empty string if filename is dot ('.')
https://bugs.ruby-lang.org/issues/15244

* Author: TiSer (Sergey TiSer)
* Status: Open
* Priority: Normal
* Assignee: 
* Target version: 
* ruby -v: 2.5.0p0
* Backport: 2.3: UNKNOWN, 2.4: UNKNOWN, 2.5: UNKNOWN
----------------------------------------
Current behaviour:
```
File.extname('..jpg')
=> ""
```

Expected behaviour: 
```
File.extname('..jpg')
=> '.'
```



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