Non-redundant locale grouping definition.

d3.js

@@ -2748,7 +2748,7 @@
   var d3_locale_enUS = d3.locale({
     decimal: ".",
     thousands: ",",
-    grouping: [ 3, 3 ],
+    grouping: [ 3 ],
     currency: [ "$", "" ],
     dateTime: "%a %b %e %X %Y",
     date: "%m/%d/%Y",

src/locale/en-US.js

@@ -3,7 +3,7 @@ import "locale";
 var d3_locale_enUS = d3.locale({
   decimal: ".",
   thousands: ",",
-  grouping: [3, 3],
+  grouping: [3],
   currency: ["$", ""],
   dateTime: "%a %b %e %X %Y",
   date: "%m/%d/%Y",

src/locale/ru-RU.js

@@ -3,7 +3,7 @@ import "locale";
 d3.locale.ru_RU = d3.locale({
   decimal: ",",
   thousands: "\xa0",
-  grouping: [3, 3],
+  grouping: [3],
   currency: ["", " руб."],
   dateTime: "%A, %e %B %Y г. %X",
   date: "%d.%m.%Y",