fixed doxygen warnings

lib/settings.h

@@ -181,7 +181,7 @@ public:
     bool reportProgress;
 
     /**
-     * @brief Is there any #if configurations in the source code?
+     * @brief Is there any preprocessor configurations in the source code?
      * As usual, include guards are not counted.
      */
     bool ifcfg;

lib/tokenize.h

@@ -77,7 +77,8 @@ public:
      *
      * @param FileName The filename
      * @param configuration E.g. "A" for code where "#ifdef A" is true
-     * @return false if Source code contains syntax errors
+     * @param preprocessorCondition Set this flag to true if the code is a preprocessor condition. It disables some simplifications
+     * @return false if source code contains syntax errors
      */
     bool tokenize(std::istream &code,
                   const char FileName[],