Use binwrite only on Windows, closes #14101

Author: josevalim

lib/mix/lib/mix/shell/io.ex

@@ -100,12 +100,12 @@ defmodule Mix.Shell.IO do
  """
  def cmd(command, opts \\ []) do
  print_app? = Keyword.get(opts, :print_app, true)
+ windows? = match?({:win32, _}, :os.type())
 
  Mix.Shell.cmd(command, opts, fn data ->
  if print_app?, do: print_app()
- # Due to encoding of shell command on Windows,
- # let's write the data as is
- IO.binwrite(data)
+ # Due to encoding of shell command on Windows, write the data as is.
+ if windows?, do: IO.binwrite(data), else: IO.write(data)
  end)
  end
 end