new-feature：1.添加带表达式内容的xml格式化。2.支持带特殊字符的读写，如& < > "。

MainWidget.h

@@ -1,12 +1,6 @@
 #ifndef MAINWIDGET_H
 #define MAINWIDGET_H
 
-#include "conf_setting.h"
-#include "src/attribute_edit.h"
-#include "src/config.h"
-#include "src/xml_opr.h"
-#include "src/history.h"
-#include "src/uhistory.h"
 #include <QAction>
 #include <QMenu>
 #include <QMessageBox>
@@ -14,6 +8,13 @@
 #include <QWidget>
 #include <unordered_map>
 
+#include "conf_setting.h"
+#include "src/attribute_edit.h"
+#include "src/config.h"
+#include "src/history.h"
+#include "src/uhistory.h"
+#include "src/xml_opr.h"
+
 struct SElement_t {
     SElement_t(Element_t* e, std::string& s);
     Element_t* ele;
@@ -51,7 +52,8 @@ public:
 public:
     void set_work_exe(char* path);
     void generate_table_widget();
-    void push_content(const std::vector<Element_t*>& eles, std::size_t page = 1, bool auto_jump_pre = false);
+    void push_content(const std::vector<Element_t*>& eles, std::size_t page = 1,
+                      bool auto_jump_pre = false);
 
 private:
     bool read(const QString& file_path);
@@ -74,6 +76,7 @@ private:
     void backup_file();
     void base_init();
     void unit_change();
+    bool format_xml();
 
 private:
     std::string extract_prefix(const std::string& name);