Add a clarifying comment

In case I forget why I have support in here for very large bases.

diff --git a/src/joinDigits.js b/src/joinDigits.js
index 605313c8dbfc05515014f035a8d8d68cb680f6b5..9464f8a6345a82fe542409cfa8d7ef130668e563 100644 (file)
--- a/src/joinDigits.js
+++ b/src/joinDigits.js
@@ -9,6 +9,7 @@ import DIGITS from './DIGITS';
 
 function encode(number: string, base: number) {
   if (base > 36 && base <= 62) {
+    // This branch really only ever called for serializing to the URL.
     return DIGITS[number - 1];
   } else {
     return number.toString(base);