fix for comment

Special charcters I guess

Author: BrianWendt

docs/lib/JSONSchemaMarkdown.js

@@ -732,7 +732,7 @@ class JSONSchemaMarkdown {
     slugify(string) {
         return string.toString().toLowerCase()
                 .replace(/\s+/g, '-') // Replace spaces with -
-                .replace(/&/g, '-and-') // Replace & with ‘and’
+                .replace(/&/g, '-and-') // Replace & with "-and-"
                 .replace(/[^\w-.]+/g, '') // Remove all non-word characters
                 .replace(/--+/g, '-') // Replace multiple - with single -
                 .replace(/^-+/, '') // Trim - from start of text