Fix overlapping text in wide terminals

aloud.py

@@ -663,7 +663,7 @@ def _commit(self, idx):
         with self.out_lock:
             if self._above:
                 sys.stdout.write(f"\x1b[{self._above}A")
-            sys.stdout.write("\x1b[J")
+            sys.stdout.write("\r\x1b[J")
             sys.stdout.write("".join(f"{l}\n" for l in para))
             sys.stdout.flush()
         self._above = 0

tests/test_terminal_rendering.py

@@ -0,0 +1,29 @@
+import io
+import threading
+import unittest
+from unittest.mock import patch
+
+from aloud import Player, Segment
+
+
+class TerminalRenderingTests(unittest.TestCase):
+    def test_commit_returns_to_first_column_before_clearing_live_region(self):
+        player = Player.__new__(Player)
+        player.chunks = [Segment("one two three four five six")]
+        player.out_lock = threading.Lock()
+        player._above = 2
+        player._para_lines = 2
+        output = io.StringIO()
+
+        with patch.object(Player, "_term_width", return_value=18), \
+                patch("sys.stdout", output):
+            player._commit(0)
+
+        self.assertEqual(
+            output.getvalue(),
+            "\x1b[2A\r\x1b[Jone two three four\nfive six\n",
+        )
+
+
+if __name__ == "__main__":
+    unittest.main()