Fix docComments rule for macros

Sources/ParsingHelpers.swift

@@ -2491,7 +2491,7 @@ extension Token {
             "import", "let", "var", "typealias", "func", "enum", "case",
             "struct", "class", "actor", "protocol", "init", "deinit",
             "extension", "subscript", "operator", "precedencegroup",
-            "associatedtype",
+            "associatedtype", "macro",
         ])
 
         for keywordToExclude in keywordsToExclude {

Tests/RulesTests+Syntax.swift

@@ -3322,6 +3322,17 @@ class SyntaxTests: RulesTests {
         testFormatting(for: input, rule: FormatRules.docComments)
     }
 
+    func testDocCommentForMacro() {
+        let input = """
+        /// Adds a static `logger` member to the type.
+        @attached(member, names: named(logger)) public macro StaticLogger(
+            subsystem: String? = nil,
+            category: String? = nil
+        ) = #externalMacro(module: "StaticLoggerMacros", type: "StaticLogger")
+        """
+        testFormatting(for: input, rule: FormatRules.docComments)
+    }
+
     // MARK: - conditionalAssignment
 
     func testDoesntConvertIfStatementAssignmentSwift5_8() {