StringRankedSearch inconsistent results when numbers and letters are mixed

[kean]

Demonstrated by the following unit tests (originally reported here #23776):

  func testSearchBeginingOrEnd() {
         XCTAssertEqual(score("AB00", "AB"), score("ABXX", "AB"), accuracy: 0.1)
         XCTAssertEqual(score("4200", "42"), score("42XX", "42"), accuracy: 0.1)

         XCTAssertEqual(score("00AB", "AB"), score("XXAB", "AB"), accuracy: 0.1)
         XCTAssertEqual(score("0042", "42"), score("XX42", "42"), accuracy: 0.1)

         XCTAssertEqual(score("AB_00", "AB"), score("AB_XX", "AB"), accuracy: 0.1)
         XCTAssertEqual(score("42_00", "42"), score("42_XX", "42"), accuracy: 0.1)

         XCTAssertEqual(score("00_AB", "AB"), score("XX_AB", "AB"), accuracy: 0.1)
         XCTAssertEqual(score("00_42", "42"), score("XX_42", "42"), accuracy: 0.1)

         XCTAssertEqual(score("AB/00", "AB"), score("AB/XX", "AB"), accuracy: 0.1)
         XCTAssertEqual(score("42/00", "42"), score("42/XX", "42"), accuracy: 0.1)

         XCTAssertEqual(score("00/AB", "AB"), score("XX/AB", "AB"), accuracy: 0.1)
         XCTAssertEqual(score("00/42", "42"), score("XX/42", "42"), accuracy: 0.1)
     }

     func testCompareSearchNumbersAndLetters() {
         XCTAssertEqual(score("42XX", "42"), score("ABXX", "AB"), accuracy: 0.1)
         XCTAssertEqual(score("0042", "42"), score("XXAB", "AB"), accuracy: 0.1)
         XCTAssertEqual(score("42_00", "42"), score("AB_XX", "AB"), accuracy: 0.1)
         XCTAssertEqual(score("00_42", "42"), score("XX_AB", "AB"), accuracy: 0.1)
         XCTAssertEqual(score("42/00", "42"), score("AB/XX", "AB"), accuracy: 0.1)
         XCTAssertEqual(score("00/42", "42"), score("XX/AB", "AB"), accuracy: 0.1)
     }

[dangermattic]

Thanks for reporting! 👍