How to suppress "Input is not from a terminal" message?

Hi,

I would like to embed vim code inside bash script.

I have simple text file text_file.txt with content:

aaa

Content sample.sh file:

#!/bin/bash
echo "Start running vim commands inside bash program."
vim +"so dummy.vim" << EOF
   :e text_file.txt
   :s/a/b/
   :x
EOF
echo "End of running run vim commands inside bash program."

Above code opens text_file.txt, replaces letter a with b and saves the file.

When I run sample.sh file from shell: ./sample.sh

The output on terminal is:

Start running vim commands inside bash program.
Vim: Warning: Input is not from a terminal
End of running run vim commands inside bash program.

and script does get executed, so file text_file.txt correctly gets changed to baa

The only little bit annoying thing is the Vim: Warning: Input is not from a terminal message in terminal. How to suppress this message?

Thanks.

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