[Issue 13989] add system-specific ext to -of parameter if ext is invalid

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=13989

bb.temp at gmx.com changed:

           What    |Removed                     |Added
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             Status|NEW                         |RESOLVED
         Resolution|---                         |LATER

--- Comment #3 from bb.temp at gmx.com ---
implementation of the -fe switch tested in ddmd. Maybe later when real D string
will be used.

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