tundebabzy 26a39610ca fixes #8941: Better error message for duplicate items (#8968)
* fixes #8941: Better error message for duplicate items

* gathers all non unique items instead of first encountered non unique item

* renders errored items with `br` instead of `li`
2017-06-13 17:40:56 +05:30
..
2017-02-20 13:38:31 +05:30