fix: formatting

Author: sgratzl

themes/delphi/assets/css/pages/_covidcast.scss

@@ -16,7 +16,7 @@
   position: relative;
 
   &::before {
-    content: '';
+    content: "";
     position: absolute;
     bottom: 0;
     left: 0;
@@ -27,4 +27,4 @@
   .uk-tab::before {
     display: none;
   }
-}
+}