Add commas where people expect commas in sets
tree57be6b5057bb0a00523755b91569d611e1063f7f
-rw-r--r-- 751 LICENSE
-rw-r--r-- 865 Makefile
-rw-r--r-- 3567 README
-rw-r--r-- 2888 matroid-finder.1
-rw-r--r-- 28002 matroid-finder.c
-rw-r--r-- 339 n=3_plabic_graph.txt
-rw-r--r-- 427 n=4_plabic_graph.txt