check if there's anything in a list..

app/c.js

@@ -11,7 +11,9 @@ function captureFrontMatterAndMarkdown() {
     } else if (k.endsWith('[]')) {
       formData.set(k, formData.getAll(k))
       var s = JSON.stringify(formData.getAll(k)[0].split(","))
-      frontmatter += `${k.slice(0, -2)}: ${s}\n`
+      if (s != "") {
+        frontmatter += `${k.slice(0, -2)}: ${s}\n`
+      }
     } else if (k == "relpath") {
       filepath = `${location.pathname.split('/public')[0]}/content/${formData.get(k)}`
       gitpath = `${location.pathname.split('/public')[0]}`