Standardize on the vi editing directives being on the first line.
diff --git a/e2fsprogs/ext2fs/ext2_io.h b/e2fsprogs/ext2fs/ext2_io.h
index 190f6c1..e6c9630 100644
--- a/e2fsprogs/ext2fs/ext2_io.h
+++ b/e2fsprogs/ext2fs/ext2_io.h
@@ -1,3 +1,4 @@
+/* vi: set sw=4 ts=4: */
 /*
  * io.h --- the I/O manager abstraction
  *