Function spawn_editor::spawn_editor_generic

pub fn spawn_editor_generic<Ta, Tb>(
    override_editor: Option<Ta>, 
    extra_args: &[Tb]
) -> Result<ExitStatus, SEError> where
    Ta: AsRef<str>,
    Tb: AsRef<str>, 

This function is a convenient wrapper around spawn_editor, in case that the arguments aren't simple string slices