tools/vm/slabinfo: align usage output columns

Usage message uses spaces not tabspaces, a few tabspaces have snuck in
making the columns not align correctly when output.

Align usage output columns using spaces instead of tabspaces.

Link: http://lkml.kernel.org/r/20190212001219.27769-4-tobin@kernel.orgSigned-off-by: Tobin C. Harding <tobin@kernel.org>
Acked-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

tools/vm/slabinfo.c

@@ -124,13 +124,13 @@ static void usage(void)
 		"-L|--Loss              Sort by loss\n"
 		"-n|--numa              Show NUMA information\n"
 		"-N|--lines=K           Show the first K slabs\n"
-		"-o|--ops		Show kmem_cache_ops\n"
-		"-r|--report		Detailed report on single slabs\n"
+		"-o|--ops               Show kmem_cache_ops\n"
+		"-r|--report            Detailed report on single slabs\n"
 		"-s|--shrink            Shrink slabs\n"
 		"-S|--Size              Sort by size\n"
 		"-t|--tracking          Show alloc/free information\n"
 		"-T|--Totals            Show summary information\n"
-		"-U|--Unreclaim		Show unreclaimable slabs only\n"
+		"-U|--Unreclaim         Show unreclaimable slabs only\n"
 		"-v|--validate          Validate slabs\n"
 		"-z|--zero              Include empty slabs\n"
 		"-1|--1ref              Single reference\n"