Fix: minor

_locales/en/messages.json

@@ -826,7 +826,7 @@
     }
   },
   "meta_missingEOT": {
-    "message": "Expect EOT list",
+    "message": "Expect EOT data",
     "description": "Error displayed when the value is expected to be an EOT list"
   },
   "meta_missingMandatory": {

edit/codemirror-default.js

@@ -373,9 +373,7 @@ CodeMirror.hint && (() => {
     // USO vars in usercss mode editor
     const vars = editor.getStyle().usercssData.vars;
     const list = vars ?
-      Object.keys(editor.getStyle().usercssData.vars)
-        .filter(name => name.startsWith(leftPart)) :
-      [];
+      Object.keys(vars).filter(name => name.startsWith(leftPart)) : [];
     return {
       list,
       from: {line, ch: prev},