[TAR] Remove argument label from TarWriter.append

Sources/TAR/TarWriter.swift

@@ -21,7 +21,7 @@ public struct TarWriter {
         self.localPaxHeaderCounter = 0
     }
 
-    public mutating func append(entry: TarEntry) throws {
+    public mutating func append(_ entry: TarEntry) throws {
         var out = Data()
         if format == .gnu {
             if entry.info.name.utf8.count > 100 {

Tests/TarCreateTests.swift

@@ -66,7 +66,7 @@ class TarCreateTests: XCTestCase {
         try "".write(to: tempFileUrl, atomically: true, encoding: .utf8)
         let handle = try FileHandle(forWritingTo: tempFileUrl)
         var writer = TarWriter(fileHandle: handle)
-        try writer.append(entry: entry)
+        try writer.append(entry)
         try writer.finalize()
         let containerData = try Data(contentsOf: tempFileUrl)
         XCTAssertEqual(try TarContainer.formatOf(container: containerData), .pax)