!76 修复 BUG 修复当打开关联文件时多出一行行号的问题

Merge pull request !76 from 格物方能致知/fix-I7ZE89

src/main/java/org/jcnc/jnotepad/controller/event/handler/menubar/OpenFile.java

@@ -113,7 +113,10 @@ public class OpenFile implements EventHandler<ActionEvent> {
             StringBuilder textBuilder = new StringBuilder();
             String line;
             while ((line = reader.readLine()) != null) {
-                textBuilder.append(line).append("\n");
+                if (!textBuilder.isEmpty()) {
+                    textBuilder.append("\n");
+                }
+                textBuilder.append(line);
             }
             String text = textBuilder.toString();
             LogUtil.getLogger(this.getClass()).info("已调用读取文件功能");

src/main/java/org/jcnc/jnotepad/root/top/menu/TopMenuBar.java

@@ -135,6 +135,7 @@ public class TopMenuBar extends MenuBar {
         }
     }
 
+
     /**
      * 初始化菜单栏
      */

src/main/java/org/jcnc/jnotepad/ui/module/LineNumberTextArea.java

@@ -122,7 +122,6 @@ public class LineNumberTextArea extends BorderPane {
          */
         double mainTextAreaScrollTop = mainTextArea.getScrollTop();
         double lineNumberAreaScrollTop = lineNumberArea.getScrollTop();
-
         int numOfLines = mainTextArea.getParagraphs().size();
         StringBuilder lineNumberText = new StringBuilder();
         for (int i = 1; i <= numOfLines; i++) {