Refactorizations in test suite:

- Removed another custom stringify implementation (testtoken.cpp)
- Removed unnecessary forward declaration (testsuite.h)
- Use std::ostringstream instead of std::stringstream (redirect.h)

test/redirect.h

@@ -62,8 +62,8 @@ public:
     }
 
 private:
-    std::stringstream _out;
-    std::stringstream _err;
+    std::ostringstream _out;
+    std::ostringstream _err;
     std::streambuf* _oldCout;
     std::streambuf *_oldCerr;
 };

test/testsuite.h

@@ -26,8 +26,6 @@
 
 class options;
 
-class Token;
-
 class TestFixture : public ErrorLogger {
 private:
     static std::ostringstream errmsg;

test/testtoken.cpp

@@ -207,13 +207,7 @@ private:
     void eraseTokens() {
         givenACodeSampleToTokenize code("begin ; { this code will be removed } end");
         Token::eraseTokens(code.tokens()->next(), code.tokens()->tokAt(9));
-        std::ostringstream ret;
-        for (const Token *tok = code.tokens(); tok; tok = tok->next()) {
-            if (tok != code.tokens())
-                ret << " ";
-            ret << tok->str();
-        }
-        ASSERT_EQUALS("begin ; end", ret.str());
+        ASSERT_EQUALS("begin ; end", code.tokens()->stringifyList(0, false));
     }