Input bibtex
@article{abcd,
title = "Title",
author = "Doe, John",
howpublished = {\url{http://example.com/}},
notes = "\url{https://google.com/}",
}
Output bibtex
@article{abcd,
title = "Title",
author = "Doe, John",
howpublished = {\url{http://example.com/}},
notes = "\urlhttps://google.com/",
}
The {} of the url macro should not be removed in the notes field. It should either be converted to a {} quote or kept as a special case for "" quote.