fix rendering of the progress bar static viz without a grouping separator (#19196)

frontend/src/metabase/static-viz/lib/numbers.ts

@@ -45,7 +45,7 @@ export const formatNumber = (number: number, options: NumberFormatOptions) => {
   const formattedNumber = format
     .format(number * scale)
     .replace(/\./g, decimal_separator)
-    .replace(/,/g, grouping_separator);
+    .replace(/,/g, grouping_separator ?? "");
 
   return `${prefix}${formattedNumber}${suffix}`;
 };

frontend/src/metabase/static-viz/lib/numbers.unit.spec.js

@@ -89,6 +89,16 @@ describe("formatNumber", () => {
 
     expect(text).toEqual("prefix15suffix");
   });
+
+  it("should format a number without grouping separator", () => {
+    const number = 10000.11;
+
+    const text = formatNumber(number, {
+      number_separators: ".",
+    });
+
+    expect(text).toEqual("10000.11");
+  });
 });
 
 describe("formatPercent", () => {