Leverage frozen set for extensions (#176)

Author: SimonCropp

src/Directory.Build.props

@@ -2,7 +2,7 @@
 <Project>
   <PropertyGroup>
     <NoWarn>CS1591;CS0649</NoWarn>
-    <Version>8.2.0</Version>
+    <Version>8.3.0</Version>
     <LangVersion>preview</LangVersion>
     <AssemblyVersion>1.0.0</AssemblyVersion>
     <Description>A collection of minimal binary files.</Description>

src/EmptyFiles/AllFiles.cs

@@ -56,9 +56,11 @@ void Append(FrozenDictionary<string, EmptyFile> files)
     static FrozenDictionary<string, EmptyFile> AddCategory(FrozenSet<string> extensions, Category category, string emptyDirectory)
     {
         Dictionary<string, EmptyFile> items = [];
-        var categoryDirectory = Path.Combine(emptyDirectory, category
-            .ToString()
-            .ToLowerInvariant());
+        var categoryDirectory = Path.Combine(
+            emptyDirectory,
+            category
+                .ToString()
+                .ToLowerInvariant());
         foreach (var extension in extensions)
         {
             var file = Path.Combine(categoryDirectory, $"empty{extension}");