Some refactorings:

- Overrides added
 - usages of push_back() replaced with emplace_back()
 - Loop variable made const-refernce
 - NULL replaced with nullptr
 - Names used in the declaration and definition unified
 - size() replaced with empty
 - Identical cases merged

include/internal/catch_test_case_info.cpp

@@ -89,7 +89,7 @@ namespace Catch {
             }
         }
         if( isHidden ) {
-            tags.push_back( "." );
+            tags.emplace_back( "." );
         }
 
         TestCaseInfo info( static_cast<std::string>(nameAndTags.name), _className, desc, tags, _lineInfo );