Fix citations not getting cleared correctly

macrovision.js

@@ -428,6 +428,7 @@ const unitChoices = {
             "kilometers^2",
         ],
         "customary": [
+            "inches^2",
             "feet^2",
             "acres",
             "miles^2"
@@ -2310,6 +2311,8 @@ function displayAttribution(file) {
 
     }
 
+    citationHolder.innerHTML = "";
+    
     if (citations === [] || citations === undefined) {
 
     } else {