Update mtx.txt

Author: Will Kimmerer

benchmarks/mtx.txt

@@ -1,7 +1,7 @@
 # You may provide paths or SuiteSparse ID numbers here.
 # A hashtag denotes a commented line.
 # /home/faculty/d/davis/Freescale2.mtx
-2662
+# 2662
 # /home/faculty/d/davis/indochina-2004.mtx
 # 2451
 # /home/faculty/d/davis/nd24k.mtx
@@ -15,4 +15,4 @@
 # /raid/GAP/GAP-web/GAP-web.mtx
 # /raid/GAP/GAP-urand/GAP-urand.mtx
 # /raid/GAP/GAP-kron/GAP-kron.mtx
-
+290