whitespace fixes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/archival/tar.c b/archival/tar.c
index 9dd7453..5ddff7f 100644
--- a/archival/tar.c
+++ b/archival/tar.c
@@ -237,7 +237,7 @@
 	struct tar_header_t header;
 
 	memset(&header, 0, sizeof(header));
- 
+
 	strncpy(header.name, header_name, sizeof(header.name));
 
 	/* POSIX says to mask mode with 07777. */