Fix formatItemsPerSecond with double = true (#1148)

* Show double flag with items per second being 1

formatItemsPerSecond in utils.js does not indicate two items being processed in a building
if speed is exactly one item per second. That is now fixed.

* Fix code style to fit guidelines

src/js/core/utils.js

@@ -573,12 +573,14 @@ export function round1DigitLocalized(speed, separator = T.global.decimalSeparato
  * @param {string=} separator The decimal separator for numbers like 50.1 (separator='.')
  */
 export function formatItemsPerSecond(speed, double = false, separator = T.global.decimalSeparator) {
-    return speed === 1.0
-        ? T.ingame.buildingPlacement.infoTexts.oneItemPerSecond
-        : T.ingame.buildingPlacement.infoTexts.itemsPerSecond.replace(
-              "<x>",
-              round2Digits(speed).toString().replace(".", separator)
-          ) + (double ? "  " + T.ingame.buildingPlacement.infoTexts.itemsPerSecondDouble : "");
+    return (
+        (speed === 1.0
+            ? T.ingame.buildingPlacement.infoTexts.oneItemPerSecond
+            : T.ingame.buildingPlacement.infoTexts.itemsPerSecond.replace(
+                  "<x>",
+                  round2Digits(speed).toString().replace(".", separator)
+              )) + (double ? "··" + T.ingame.buildingPlacement.infoTexts.itemsPerSecondDouble : "")
+    );
 }
 
 /**