small fixes

file.txt

@@ -1 +1,13 @@
-asdasdhello worlasnigasaafaaafaasddsfasddsadsasdsdaasdsasdadasdadsasdasdddadakasdfsfd
+lorem ipsujm dolor sit amet ealfd jfjfa ioeaao e la skdf aakajkaj adsf
+
+never gonna give you up
+never gonna let you down
+never gonna run around
+and desert
+                    ___
+..........----...../   \....
+
+   /\
+   ||
+   ||
+  desert

writer/__main__.py

@@ -129,8 +129,9 @@ def move_up(y: int, x: int, line_pos: int, cur_line: int, lines: list[str], ncol
 
     if cur_line > 0:
         cur_line -= 1
-        if line_pos > 0:
-            line_pos = 0
+        line_len = len(lines[cur_line])
+        if line_pos > line_len:
+            line_pos = line_len
     else:
         return None
 
@@ -202,6 +203,8 @@ def main(lines: list[str]):
             if mv is None:
                 rprint(KEY_BELL)
             else:
+                if line_pos == 0:
+                    del lines[cur_line]
                 y, x, line_pos, cur_line = mv
                 move(y, x)
                 rprint(' ')
@@ -240,7 +243,9 @@ if __name__ == "__main__":
 
     if exists:
         with open('file.txt', 'w') as file:
-            file.writelines(lines)
+            if lines[-1] == '':
+                del lines[-1]
+            file.writelines([l + '\n' for l in lines])
 
 
 """OLD CODE