fix comments in example_arcade as well

example_arcade.html

@@ -10,9 +10,9 @@
        this file as well as es6-promise.js, browserfs.js and loader.js are
        required. The logo and images directories are optional, but the
        splash screen looks quite a lot better when they're available. -->
-<!-- * Use "git annex get <file>" to download emulators/jsmess/messexidy.js;
+<!-- * Use "git annex get <file>" to download emulators/jsmess/mameexidy.js;
        if you don't have git-annex you can download it from IA manually
-       (https://archive.org/download/emularity_engine_jsmame/messexidy.js.gz) -->
+       (https://archive.org/download/emularity_engine_v1/mameexidy.js.gz) -->
 <!-- * Download the Targ ROM files from http://mamedev.org/roms/targ/ -->
 <!-- * Place the Targ ROM .zip file in an "examples" subdirectory. -->
 <!-- * Visit your example_arcade.html file with a modern Javascript-capable browser. -->