archive/tar: update documentation to match current coding style

R=rsc, r
CC=golang-dev
https://golang.org/cl/903044

src/pkg/archive/tar/reader.go

@@ -24,9 +24,9 @@ var (
 // and then it can be treated as an io.Reader to access the file's data.
 //
 // Example:
-//	tr := tar.NewReader(r);
+//	tr := tar.NewReader(r)
 //	for {
-//		hdr, err := tr.Next();
+//		hdr, err := tr.Next()
 //		if err != nil {
 //			// handle error
 //		}
@@ -34,7 +34,7 @@ var (
 //			// end of tar archive
 //			break
 //		}
-//		io.Copy(data, tr);
+//		io.Copy(data, tr)
 //	}
 type Reader struct {
 	r   io.Reader

src/pkg/archive/tar/writer.go

@@ -25,15 +25,15 @@ var (
 // writing at most hdr.Size bytes in total.
 //
 // Example:
-//	tw := tar.NewWriter(w);
-//	hdr := new(Header);
-//	hdr.Size = length of data in bytes;
+//	tw := tar.NewWriter(w)
+//	hdr := new(Header)
+//	hdr.Size = length of data in bytes
 //	// populate other hdr fields as desired
 //	if err := tw.WriteHeader(hdr); err != nil {
 //		// handle error
 //	}
-//	io.Copy(tw, data);
-//	tw.Close();
+//	io.Copy(tw, data)
+//	tw.Close()
 type Writer struct {
 	w          io.Writer
 	err        os.Error