Removed extra quotes.

Thanks to xet7 !

client/components/sidebar/sidebar.jade

@@ -400,11 +400,11 @@ template(name="exportBoard")
     li
       a(href="{{exportCsvUrl}}", download="{{exportCsvFilename}}")
         i.fa.fa-share-alt
-        | {{_ 'export-board-csv'}} ' , '
+        | {{_ 'export-board-csv'}} ,
     li
       a(href="{{exportScsvUrl}}", download="{{exportCsvFilename}}")
         i.fa.fa-share-alt
-        | {{_ 'export-board-csv'}} ' ; '
+        | {{_ 'export-board-csv'}} ;
     li
       a(href="{{exportTsvUrl}}", download="{{exportTsvFilename}}")
         i.fa.fa-share-alt