ext4: remove extraneous newline from the "no extents" warning message

Signed-off-by: Nick Warne <nick@ukfsn.org>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

--- linux-2.6.28/fs/ext4/super.cORIG	2008-12-25 01:35:49.156527726 +0000
+++ linux-2.6.28/fs/ext4/super.c	2008-12-25 01:36:50.914527855 +0000
@@ -1973,7 +1973,7 @@
 	else
 		ext4_warning(sb, __func__,
 			"extents feature not enabled on this filesystem, "
-			"use tune2fs.\n");
+			"use tune2fs.");
 
 	/*
 	 * enable delayed allocation by default