Updated test case docs

docs/test_cases/t00016.md

@@ -0,0 +1,47 @@
+# t00016 - Unnamed enums and empty templates
+## Config
+```yaml
+compilation_database_dir: ..
+output_directory: puml
+diagrams:
+  t00016_class:
+    type: class
+    glob:
+      - ../../tests/t00016/t00016.cc
+    using_namespace:
+      - clanguml::t00016
+    include:
+      namespaces:
+        - clanguml::t00016
+
+```
+## Source code
+```cpp
+namespace clanguml {
+namespace t00016 {
+
+template <typename> struct is_numeric {
+    enum { value = false };
+};
+
+template <> struct is_numeric<char> {
+    enum { value = true };
+};
+
+template <> struct is_numeric<unsigned char> {
+    enum { value = true };
+};
+
+template <> struct is_numeric<int> {
+    enum { value = true };
+};
+
+template <> struct is_numeric<bool> {
+    enum { value = false };
+};
+}
+}
+
+```
+## Generated UML diagrams
+![t00016_class](./t00016_class.png "Unnamed enums and empty templates")