From perlrun: 
    -i[extension]
      ...

      If no extension is supplied, no backup is made and
      the current file is overwritten.

[download]

However, on Dos and some other OSes the extension is mandatory. This is due to the fact that these OSes cannot unlink an open file.

--
John.

In reply to Re: Re: Add a newline to the end of a file by jmcnamara
in thread Add a newline to the end of a file by jmcnamara

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