Etag contains redundant double quotes

[xunfeng1980]

code

  println!("{:?}", meta.etag().unwrap_or_default());

log

""
""
"\"0d3e7c604516d129e1f58bae2c61a79a\""
"\"1f4d8821e1f7642dd5054dd4fd7a6681\""
"\"280da88aece9858c9d8a194b5541a7c3\""
"\"fa767856c741056a34f5b216498eba92\""
"\"2b41259eaf25a498f11e798cd612049f\""
"\"5776cf666fecb9ef58390e24f2731a95\""
"\"a8c6f28f01c2759d95dd0b9f73fb1e5d\""
"\"152962cb6216620c1431a58211f43404\""
"\"526e8d73b057f5bb4afdba5875896152\""
"\"86d3f3a95c324c9479bd8986968f4327\""
"\"2f5189be1c5693bac4682ed005fa4763\""
"\"32cdf3244c5db5b4e3a255077f414bf1\""
"\"869cd75991edd1a960e2bc80644d45f4\""
"\"8700ee53c99d32157295d401ab8f0a15\""
"\"af205fa9b84eb9cebb504ed11c61f92d\""

[Xuanwo]

By design. ETag's content does have " and "abc" is different from abc.

For more information: https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/ETag