Updated test cases docs

docs/test_cases/t00003.md

@@ -18,6 +18,7 @@ diagrams:
 ## Source code
 ```cpp
 #include <functional>
+#include <string>
 
 namespace clanguml {
 namespace t00003 {

docs/test_cases/t00014.md

@@ -58,7 +58,7 @@ using AStringString = AString<std::string>;
 using BStringString = AStringString;
 
 class R {
-    //clang-uml: tinst A<T, std::string>
+    // clang-uml: tinst A<T, std::string>
     A<bool, std::string> boolstring;
     AString<float> floatstring;
     AIntString intstring;