Suppress highlighting of errors

because the highlighted ones false positives (bug in kramdown/rouge? don't want to invest time), and we test the YAML files against the JSON Schema for OpenAPI, so they are more than just syntactically correct

_includes/example-api-description.md

@@ -1,18 +1,15 @@
 # {{ include.name }}
 
-{% assign json_file = include.name | append: ".json" %}
-{% assign yaml_file = include.name | append: ".yaml" %}
-
 {{ include.description }}
 
 ## JSON
 
 ```json
-{% include_relative {{ json_file }} %}
+{% include_relative {{ include.name | append: ".json" }} %}
 ```
 
 ## YAML
 
 ```yaml
-{% include_relative {{ yaml_file }} %}
+{% include_relative {{ include.name | append: ".yaml" }} %}
 ```

_sass/custom/custom.scss

@@ -2,7 +2,11 @@ object {
     width: 100%;
 }
 
-
 .nav-list .nav-list-item .nav-list-expander {
     color: #1d781d !important;
-}
+}
+
+.highlight .err {
+    color: inherit;
+    background-color: inherit;
+}