$ xxd src/index.wiki.orig 
0000000: 2828 7469 746c 6520 2e20 2269 6e64 6578  ((title . "index
0000010: 2229 29       

$ xxd src/index.wiki
0000000: efbb bf28 2874 6974 6c65 202e 2022 696e  ...((title . "in
0000010: 6465 7822 2929 0a                        dex")).