4: Add solution to Rust track exercise "Reverse String".

Dependencies

• [2] W2V5PYAQ 3: Add Rust track exercise "Reverse String".

Change contents

• replacement in rust/reverse-string/tests/reverse-string.rs at line 12
  [2.555]→[2.555:597](∅→∅)
  − assert_eq!(&reverse(input), expected)
  [2.555]

  [2.597]
  + assert_eq!(&reverse(input), expected)
• replacement in rust/reverse-string/tests/reverse-string.rs at line 18
  [2.653]→[2.653:687](∅→∅)
  − process_reverse_case("", "");
  [2.653]

  [2.687]
  + process_reverse_case("", "");
• replacement in rust/reverse-string/tests/reverse-string.rs at line 25
  [2.738]→[2.738:782](∅→∅)
  − process_reverse_case("robot", "tobor");
  [2.738]

  [2.782]
  + process_reverse_case("robot", "tobor");
• replacement in rust/reverse-string/tests/reverse-string.rs at line 32
  [2.857]→[2.857:901](∅→∅)
  − process_reverse_case("Ramen", "nemaR");
  [2.857]

  [2.901]
  + process_reverse_case("Ramen", "nemaR");
• replacement in rust/reverse-string/tests/reverse-string.rs at line 39
  [2.994]→[2.994:1050](∅→∅)
  − process_reverse_case("I'm hungry!", "!yrgnuh m'I");
  [2.994]

  [2.1050]
  + process_reverse_case("I'm hungry!", "!yrgnuh m'I");
• replacement in rust/reverse-string/tests/reverse-string.rs at line 46
  [2.1113]→[2.1113:1161](∅→∅)
  − process_reverse_case("racecar", "racecar");
  [2.1113]

  [2.1161]
  + process_reverse_case("racecar", "racecar");
• replacement in rust/reverse-string/tests/reverse-string.rs at line 53
  [2.1236]→[2.1236:1282](∅→∅)
  − process_reverse_case("drawer", "reward");
  [2.1236]

  [2.1282]
  + process_reverse_case("drawer", "reward");
• replacement in rust/reverse-string/tests/reverse-string.rs at line 60
  [2.1351]→[2.1351:1397](∅→∅)
  − process_reverse_case("子猫", "猫子");
  [2.1351]

  [2.1397]
  + process_reverse_case("子猫", "猫子");
• replacement in rust/reverse-string/tests/reverse-string.rs at line 68
  [2.1499]→[2.1499:1543](∅→∅)
  − process_reverse_case("uüu", "uüu");
  [2.1499]

  [2.1543]
  + process_reverse_case("uüu", "uüu");
• edit in rust/reverse-string/src/lib.rs at line 1
  [2.1593]

  [2.1594]
  + use unicode_segmentation::UnicodeSegmentation;

  +
• replacement in rust/reverse-string/src/lib.rs at line 4
  [2.1634]→[2.1634:1695](∅→∅)
  − unimplemented!("Write a function to reverse {}", input);
  [2.1634]

  [2.1695]
  + input.graphemes(true).rev().collect()
• edit in rust/reverse-string/Cargo.toml at line 2
  [2.5944]

  [2.5944]
  + unicode-segmentation = "1.8"