Fix some private field identifiers

include/aoc/CeresSearch.hpp

@@ -27,7 +27,7 @@ class CeresSearch
     std::string getInputFileName() const override;
     void finish() override;
 private:
-    char xmas[4] = { 'X', 'M', 'A', 'S' };
+    char xmas_[4] = { 'X', 'M', 'A', 'S' };
     void computeXmasCount(const Point2& start);
     void computeX_MasCount(const Point2& start);
 };

include/aoc/GuardGallivant.hpp

@@ -21,11 +21,12 @@ class GuardGallivant
     : public LinesSolver
 {
 public:
-    Point2 start_{};
     std::string getPuzzleName() const override;
     std::string getInputFileName() const override;
     void processDataLine(const std::string& line) override;
     void finish() override;
+private:
+    Point2 start_{};
     void visitPosition(const Point2& current);
     size_t turnDirection(const size_t current) const;
     size_t getStartDirectionIndex() const;

include/aoc/HistorianHysteria.hpp

@@ -28,6 +28,6 @@ class HistorianHysteria
     virtual void processDataLine(const std::string& line) override;
     virtual void finish() override;
 private:
-    std::multiset<int> left;
-    std::multiset<int> right;
+    std::multiset<int> left_;
+    std::multiset<int> right_;
 };

include/aoc/SolverEngine.hpp

@@ -27,7 +27,6 @@ class SolverEngine
 public:
     SolverEngine(const std::vector<std::string>& inputPaths);
     void run(Solver& solver);
-
 private:
     std::vector<std::string> inputPaths_;
     std::filesystem::path tryGetValidFullInputFilePath(const std::string& inputFileName);