Fix save book

src/main/java/de/zonlykroks/advancedscripts/screen/ScriptEditScreen.java

@@ -52,7 +52,14 @@ public class ScriptEditScreen extends Screen {
         NbtCompound nbtCompound = itemStack.getNbt();
         if (nbtCompound != null) {
             BookScreen.filterPages(nbtCompound, s -> {
-                lines.addAll(Arrays.asList(s.split("\n")));
+                String[] split = s.split("\n");
+                for (String s1 : split) {
+                    if (s1.equals(" ")) {
+                        lines.add("");
+                    } else {
+                        lines.add(s1);
+                    }
+                }
             });
         }
         if (lines.isEmpty()) {
@@ -385,7 +392,7 @@ public class ScriptEditScreen extends Screen {
                 page = new StringBuilder();
             }
             if (line.isEmpty()) {
-                page.append("\n");
+                page.append(" ");
             } else {
                 page.append(line);
             }