Format a array got a vertical format，It looks too strange

[iamazy]

Input

let connect_bytes = &[
            0b0001_0000u8, 49,  // fixed header
            0x00, 0x04, 'M' as u8, 'Q' as u8, 'T' as u8, 'T' as u8, // protocol name
            0x05, // protocol version
            0b1100_1110u8, // connect flag
            0x00, 0x10, // keep alive
            0x05, 0x11, 0x10, // properties
            0x00, 0x03, 'c' as u8, 'i' as u8, 'd' as u8, // client id
            0x05, 0x02, 0x00, 0x00, 0x00, 0x10, // will properties
            0x00, 0x04, 'w' as u8, 'i' as u8, 'l' as u8, 'l' as u8, // will topic
            0x00, 0x01, 'p' as u8, // will payload
            0x00, 0x06, 'i' as u8, 'a' as u8, 'm' as u8, 'a' as u8, 'z' as u8, 'y' as u8, // username
            0x00, 0x06, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06
];

Output

let connect_bytes = &[
            0b0001_0000u8,
            52, // fixed header
            0x00,
            0x04,
            'M' as u8,
            'Q' as u8,
            'T' as u8,
            'T' as u8,     // protocol name
            0x05,          // protocol version
            0b1100_1110u8, // connect flag
            0x00,
            0x10, // keep alive
            0x05,
            0x11,
            0x00,
            0x00,
            0x00,
            0x10, // connect properties
            0x00,
            0x03,
            'c' as u8,
            'i' as u8,
            'd' as u8, // client id
            0x05,
            0x02,
            0x00,
            0x00,
            0x00,
            0x10, // will properties
            0x00,
            0x04,
            'w' as u8,
            'i' as u8,
            'l' as u8,
            'l' as u8, // will topic
            0x00,
            0x01,
            'p' as u8, // will payload
            0x00,
            0x06,
            'i' as u8,
            'a' as u8,
            'm' as u8,
            'a' as u8,
            'z' as u8,
            'y' as u8, // username
            0x00,
            0x06,
            0x01,
            0x02,
            0x03,
            0x04,
            0x05,
            0x06,
];

Expected output
I dont't think the follow code format is right, but at least it doesn't look strange

let connect_bytes = &[
            0b0001_0000u8, 49,  // fixed header
            0x00, 0x04, 'M' as u8, 'Q' as u8, 'T' as u8, 'T' as u8, // protocol name
            0x05, // protocol version
            0b1100_1110u8, // connect flag
            0x00, 0x10, // keep alive
            0x05, 0x11, 0x10, // properties
            0x00, 0x03, 'c' as u8, 'i' as u8, 'd' as u8, // client id
            0x05, 0x02, 0x00, 0x00, 0x00, 0x10, // will properties
            0x00, 0x04, 'w' as u8, 'i' as u8, 'l' as u8, 'l' as u8, // will topic
            0x00, 0x01, 'p' as u8, // will payload
            0x00, 0x06, 'i' as u8, 'a' as u8, 'm' as u8, 'a' as u8, 'z' as u8, 'y' as u8, // username
            0x00, 0x06, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06
];

Meta

• rustfmt version: rustfmt 1.4.16-stable (939e164 2020-06-11)
• From where did you install rustfmt?: rustup component add rustfmt

[ayazhafiz]

related: #4146, #2010

however I think it is unlikely for rustfmt to ever do exactly what you want here unless there is an option to group lines by comments, which seems like a niche use case. I think the best thing to do here is to attach a [rustfmt::skip] attribute.

[iamazy]

Got it, Thanks