In the JSON output "messages" array, a message can appear as below. Note the MS Word smart quotes (also called Oxford quotes) around "href" and "link". These types of characters are disliked by developers, please replace them with escaped standard quotes.

{
"type": "error",
"lastLine": 10,
"lastColumn": 56,
"firstColumn": 7,
"message": "Bad value “*** Broken Link ” for attribute “href” on element “link”: Illegal character in path segment: space is not allowed.",
"extract": "s">\n <link rel="stylesheet" href=" Broken Link ***"><scrip",
"hiliteStart": 10,
"hiliteLength": 50
}