Updated nlohmann::basicjson::empty (markdown)

nlohmann::basicjson::empty.md

@@ -4,7 +4,11 @@ bool empty() const;
 
 ## Description
 
-Checks if a JSON value has no elements, i.e. whether `begin() == end()`. The return value depends on the different value types and is defined as follows:
+Checks if a JSON value has no elements, i.e. whether `begin() == end()`.
+
+## Return value
+
+The return value depends on the different value types and is defined as follows:
 
 | Value type | return value          |
 | ---------- | --------------------- |