Use fixed culture en-US in SerializableExceptionTests (#9132)

UnitTests/BugReporter.Tests/SerializableExceptionTests.cs

@@ -12,6 +12,8 @@ using NUnit.Framework;
 namespace BugReporterTests
 {
     [TestFixture]
+    [SetCulture("en-US")]
+    [SetUICulture("en-US")]
     public sealed class SerializableExceptionTests
     {
         [MethodImpl(MethodImplOptions.NoInlining)]
@@ -72,15 +74,7 @@ namespace BugReporterTests
             StringBuilder m = new();
             foreach (string line in exceptionMessage.Split(new[] { '\n', '\r' }, StringSplitOptions.RemoveEmptyEntries))
             {
-                Match match = Regex.Match(line, @".*(?<path>\sin\s.*)");
-                if (match.Success)
-                {
-                    m.AppendLine(line.Replace(match.Groups["path"].Value, string.Empty));
-                }
-                else
-                {
-                    m.AppendLine(line);
-                }
+                m.AppendLine(Regex.Replace(line, @"^(?<keep>.*)(?<codeLocationToBeRemoved>\sin\s.*)$", "${keep}"));
             }
 
             return m.ToString();