Merge pull request #710 from marcusholl/pr/docuFixNullValues

fix: null is rendered when no default value is available instead of t…

documentation/bin/createDocu.groovy

@@ -23,7 +23,8 @@ class TemplateHelper {
 
             def props = parameters.get(it)
 
-            def defaultValue = isComplexDefault(props.defaultValue) ? renderComplexDefaultValue(props.defaultValue) : "`${props.defaultValue}`"
+            def defaultValue = isComplexDefault(props.defaultValue) ? renderComplexDefaultValue(props.defaultValue) :
+                                props.defaultValue != null ? "`${props.defaultValue}`" : ''
 
             t +=  "| `${it}` | ${props.mandatory ?: props.required ? 'yes' : 'no'} | ${defaultValue} | ${props.value ?: ''} |\n"
         }