Function format_sequence 

pub fn format_sequence(sequence: &[Option<String>]) -> String

Format a sequence array back to a space-separated string.

None values are represented as underscores.

Examples

use start_command::sequence_parser::format_sequence;
assert_eq!(format_sequence(&[Some("screen".to_string()), None, Some("docker".to_string())]),
    "screen _ docker");
assert_eq!(format_sequence(&[]), "");