Ensure leading whitespace does not change line height for lines in CodeMobject (#4392)

Co-authored-by: Francisco Manríquez Novoa <49853152+chopan050@users.noreply.github.com>

Author: behackl

manim/mobject/text/code_mobject.py

@@ -226,6 +226,8 @@ def __init__(
             )
             self.add(self.line_numbers)
 
+        for line in self.code_lines:
+            line.submobjects = [c for c in line if not isinstance(c, Dot)]
         self.add(self.code_lines)
 
         if background_config is None:

tests/test_code_mobject.py

@@ -1,3 +1,5 @@
+import numpy as np
+
 from manim.mobject.text.code_mobject import Code
 from manim.utils.color.core import ManimColor
 
@@ -29,3 +31,17 @@ def test_code_initialization_from_file():
     )
     assert len(rendered_code.code_lines) == len(rendered_code.line_numbers)
     assert rendered_code.background.fill_color == ManimColor("#101010")
+
+
+def test_line_heights_initial_whitespace():
+    rendered_code = Code(
+        code_string="""print('Hello, World!')
+for _ in range(42):
+    print('Hello, World!')
+""",
+        language="python",
+    )
+    np.testing.assert_almost_equal(
+        rendered_code.code_lines[0].height,
+        rendered_code.code_lines[2].height,
+    )