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

Dependencies

• [2] FNQ7GM3X 3: Add Rust track exercise "Reverse String".

Change contents

• replacement in rust/reverse-string/tests/reverse-string.rs at line 12
  [2.557]→[2.557:599](∅→∅)
  − assert_eq!(&reverse(input), expected)
  [2.557]

  [2.599]
  + assert_eq!(&reverse(input), expected)
• replacement in rust/reverse-string/tests/reverse-string.rs at line 18
  [2.655]→[2.655:689](∅→∅)
  − process_reverse_case("", "");
  [2.655]

  [2.689]
  + process_reverse_case("", "");
• replacement in rust/reverse-string/tests/reverse-string.rs at line 25
  [2.740]→[2.740:784](∅→∅)
  − process_reverse_case("robot", "tobor");
  [2.740]

  [2.784]
  + process_reverse_case("robot", "tobor");
• replacement in rust/reverse-string/tests/reverse-string.rs at line 32
  [2.859]→[2.859:903](∅→∅)
  − process_reverse_case("Ramen", "nemaR");
  [2.859]

  [2.903]
  + process_reverse_case("Ramen", "nemaR");
• replacement in rust/reverse-string/tests/reverse-string.rs at line 39
  [2.996]→[2.996:1052](∅→∅)
  − process_reverse_case("I'm hungry!", "!yrgnuh m'I");
  [2.996]

  [2.1052]
  + process_reverse_case("I'm hungry!", "!yrgnuh m'I");
• replacement in rust/reverse-string/tests/reverse-string.rs at line 46
  [2.1115]→[2.1115:1163](∅→∅)
  − process_reverse_case("racecar", "racecar");
  [2.1115]

  [2.1163]
  + process_reverse_case("racecar", "racecar");
• replacement in rust/reverse-string/tests/reverse-string.rs at line 53
  [2.1238]→[2.1238:1284](∅→∅)
  − process_reverse_case("drawer", "reward");
  [2.1238]

  [2.1284]
  + process_reverse_case("drawer", "reward");
• replacement in rust/reverse-string/tests/reverse-string.rs at line 60
  [2.1353]→[2.1353:1399](∅→∅)
  − process_reverse_case("子猫", "猫子");
  [2.1353]

  [2.1399]
  + process_reverse_case("子猫", "猫子");
• replacement in rust/reverse-string/tests/reverse-string.rs at line 68
  [2.1501]→[2.1501:1545](∅→∅)
  − process_reverse_case("uüu", "uüu");
  [2.1501]

  [2.1545]
  + process_reverse_case("uüu", "uüu");
• edit in rust/reverse-string/src/lib.rs at line 1
  [2.1596]

  [2.1597]
  + use unicode_segmentation::UnicodeSegmentation;

  +
• replacement in rust/reverse-string/src/lib.rs at line 4
  [2.1637]→[2.1637:1698](∅→∅)
  − unimplemented!("Write a function to reverse {}", input);
  [2.1637]

  [2.1698]
  + input.graphemes(true).rev().collect()
• edit in rust/reverse-string/Cargo.toml at line 2
  [2.5947]

  [2.5947]
  + unicode-segmentation = "1.8"