Re-order rac.Writer fields
diff --git a/lib/rac/writer.go b/lib/rac/writer.go
index aed9cd2..9ad35fd 100644
--- a/lib/rac/writer.go
+++ b/lib/rac/writer.go
@@ -208,14 +208,6 @@
// Nil is an invalid value.
Writer io.Writer
- // IndexLocation is whether the index is at the start or end of the RAC
- // file.
- //
- // See the RAC specification for further discussion.
- //
- // The zero value of this field is IndexLocationAtEnd: a one pass encoding.
- IndexLocation IndexLocation
-
// CodecWriter is the compression codec that this Writer can compress to.
//
// For example, use a raczlib.CodecWriter from the sibilng "raczlib"
@@ -224,6 +216,14 @@
// Nil is an invalid value.
CodecWriter CodecWriter
+ // IndexLocation is whether the index is at the start or end of the RAC
+ // file.
+ //
+ // See the RAC specification for further discussion.
+ //
+ // The zero value of this field is IndexLocationAtEnd: a one pass encoding.
+ IndexLocation IndexLocation
+
// TempFile is a temporary file to use for a two pass encoding. The field
// name says "file" but it need not be a real file, in the operating system
// sense.
