WIP: Tiny note

src/main/java/swiss/qpq/gajumaru/core/encoding/ZJ.java

@@ -316,7 +316,7 @@ public final class ZJ {
 
         // This is a nitpick but it turns out that Character.isDigit() accepts a bunch of possible
         // unicode digits as well as ASCII '0' through '9'. That's normally good, but not for
-        // parsing JSON!
+        // parsing JSON! (Shoutout to P.H. -- "only ever permit ASCII" wins this one time.)
         private static boolean isDigit(char c) {
             return c >= '0' && c <= '9';
         }