Exclude extensions from trailing comma support in Swift 6.1

Author: calda

Sources/Rules/TrailingCommas.swift

@@ -88,7 +88,7 @@ public extension FormatRule {
                    let keywordIndex = formatter.index(of: .nonSpaceOrCommentOrLinebreak, before: identifierIndex),
                    let keyword = formatter.token(at: keywordIndex),
                    keyword.isKeyword,
-                   ["class", "actor", "struct", "enum", "protocol", "extension", "typealias", "func"].contains(keyword.string)
+                   ["class", "actor", "struct", "enum", "protocol", "typealias", "func"].contains(keyword.string)
                 {
                     trailingCommaSupported = true
                 }

Tests/Rules/TrailingCommasTests.swift

@@ -1081,10 +1081,15 @@ class TrailingCommasTests: XCTestCase {
             T2,
             Bool
         >
+
+        extension Dictionary<
+            String,
+            Any
+        > {}
         """
 
         let options = FormatOptions(trailingCommas: true, swiftVersion: "6.1")
-        testFormatting(for: input, rule: .trailingCommas, options: options)
+        testFormatting(for: input, rule: .trailingCommas, options: options, exclude: [.emptyExtensions, .typeSugar])
     }
 
     func testTrailingCommasRemovedFromGenericList() {