diff --git a/src/core/operations/InsertDelimiter.mjs b/src/core/operations/InsertDelimiter.mjs
index 42793160..a02ed361 100644
--- a/src/core/operations/InsertDelimiter.mjs
+++ b/src/core/operations/InsertDelimiter.mjs
@@ -47,7 +47,7 @@ class InsertDelimiter extends Operation {
             return "Invalid interval: must be a positive integer.";
         }
 
-        return input.match(new RegExp(`.{1,${parseInt(args[0])}}`, 'g')).join(args[1]);
+        return input.match(new RegExp(`.{1,${parseInt(args[0])}}`, "g")).join(args[1]);
     }
 }