Standardize on the vi editing directives being on the first line.
diff --git a/e2fsprogs/ext2fs/unix_io.c b/e2fsprogs/ext2fs/unix_io.c
index 69d01f4..474f073 100644
--- a/e2fsprogs/ext2fs/unix_io.c
+++ b/e2fsprogs/ext2fs/unix_io.c
@@ -1,3 +1,4 @@
+/* vi: set sw=4 ts=4: */
 /*
  * unix_io.c --- This is the Unix (well, really POSIX) implementation
  *	of the I/O manager.