There is a statement in docs:
'If execution fails because the file is not in executable format,
and the file is not a directory, it is assumed to be a shell
script. /bin/sh is spawned to execute it.'
I wonder if it's true or maybe I'm missing something.
My understanding is that if I create a file with shell commands but won't change its mode to executable, it will still be executed, because it is assumed to be a shell script.
But it does not.
```zsh
# Create file.
echo 'echo "Hello world"' > my_script
# Run file.
my_script
zsh: command not found: my_script
```