Refactor last commit

Author: Tyrrrz

DiscordChatExporter.Core/Utils/Extensions/PathExtensions.cs

@@ -1,22 +1,20 @@
 using System;
 using System.IO;
-using System.Linq;
 using System.Text;
 
 namespace DiscordChatExporter.Core.Utils.Extensions;
 
 public static class PathExtensions
 {
-    // Characters that are invalid on common filesystems.
     // This is a union of invalid characters from Windows (NTFS/FAT32), Linux (ext4/XFS), and macOS (HFS+/APFS).
     // We use this instead of Path.GetInvalidFileNameChars() because that only returns OS-specific characters,
-    // not filesystem-specific characters. This means that it's possible to use, for example, an NTFS drive on
-    // Linux, which would allow the OS to create filenames with '?' but result in errors when writing to the filesystem.
+    // not filesystem-specific characters. It's possible to use, for example, an NTFS drive on Linux,
+    // which would make some additional characters invalid that are otherwise valid on Linux.
     // https://github.com/Tyrrrz/DiscordChatExporter/issues/1452
     private static readonly char[] InvalidFileNameChars =
     [
         '\0', // Null character - invalid on all filesystems
-        '/', // Path separator on Unix
+        '/', // Path separator on Unix and Windows
         '\\', // Path separator on Windows
         ':', // Reserved on Windows (drive letters, NTFS streams)
         '*', // Wildcard on Windows