Fix gcc -Wall nits.

Fix format bug if NLS is in use.

Add extra so that the info directory looks OK on OpenWall.

diff --git a/doc/libext2fs.texinfo b/doc/libext2fs.texinfo
index 0816861..afa2d9e 100644
--- a/doc/libext2fs.texinfo
+++ b/doc/libext2fs.texinfo
@@ -9,7 +9,7 @@
 @dircategory Development
 @format
 START-INFO-DIR-ENTRY
-* libext2fs: (libext2fs.info).   The EXT2FS library.
+* libext2fs: (libext2fs.info).                  The EXT2FS library.
 END-INFO-DIR-ENTRY
 @end format
 @end ifinfo