config: deindent all help texts

Those two spaces after tab have no effect, and always a nuisance when editing.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/util-linux/fstrim.c b/util-linux/fstrim.c
index c07da8a..6d0d61d 100644
--- a/util-linux/fstrim.c
+++ b/util-linux/fstrim.c
@@ -13,7 +13,7 @@
 //config:	default y
 //config:	select PLATFORM_LINUX
 //config:	help
-//config:	  Discard unused blocks on a mounted filesystem.
+//config:	Discard unused blocks on a mounted filesystem.
 
 //applet:IF_FSTRIM(APPLET(fstrim, BB_DIR_SBIN, BB_SUID_DROP))