Fix Codacy suggestions

Author: Kalkwst

Algorithms.Tests/Strings/Similarity/OptimalStringAlignmentTests.cs

@@ -75,19 +75,19 @@ public void Calculate_MultipleOperations_ReturnsCorrectDistance()
         public void Calculate_FirstStringNull_ThrowsArgumentNullException()
         {
             string? nullString = null;
-#pragma warning disable CS8604 // Possible null reference argument.
+#nullable disable
             Action act = () => OptimalStringAlignment.Calculate(nullString, "example");
-#pragma warning restore CS8604 // Possible null reference argument.
+#nullable restore
             act.Should().Throw<ArgumentNullException>().WithMessage("*firstString*");
         }
 
         [Test]
         public void Calculate_SecondStringNull_ThrowsArgumentNullException()
         {
             string? nullString = null;
-#pragma warning disable CS8604 // Possible null reference argument.
+#nullable disable
             Action act = () => OptimalStringAlignment.Calculate("example", nullString);
-#pragma warning restore CS8604 // Possible null reference argument.
+#nullable restore
             act.Should().Throw<ArgumentNullException>().WithMessage("*secondString*");
         }
     }

Algorithms/Strings/Similarity/OptimalStringAlignment.cs

@@ -45,7 +45,7 @@ namespace Algorithms.Strings.Similarity
     /// This algorithm has a time complexity of O(n * m), where n and m are the lengths of the two input strings.
     /// It is efficient for moderate-sized strings but may become computationally expensive for very long strings.
     /// </remarks>
-    public class OptimalStringAlignment
+    public static class OptimalStringAlignment
     {
         /// <summary>
         /// Calculates the Optimal String Alignment distance between two strings.
@@ -56,8 +56,8 @@ public class OptimalStringAlignment
         /// <exception cref="ArgumentNullException">Thrown when either of the input strings is null.</exception>
         public static double Calculate(string firstString, string secondString)
         {
-            ArgumentNullException.ThrowIfNull(firstString, nameof(firstString));
-            ArgumentNullException.ThrowIfNull(secondString, nameof(secondString));
+            ArgumentNullException.ThrowIfNull(nameof(firstString));
+            ArgumentNullException.ThrowIfNull(nameof(secondString));
 
             if (firstString == secondString)
             {