From 3b7e51bc69668e983de52c2e026a2c7a64d76c1a Mon Sep 17 00:00:00 2001
From: Eymeric Chauchat <73040902+Eymeric65@users.noreply.github.com>
Date: Wed, 26 Nov 2025 17:29:25 +0900
Subject: [PATCH 1/2] Set default stroke width for SVG shapes without it

Following SVG standard, when a stroke color is supplied without a line stroke, a line stroke is applied by default. This copy the behavior to manim
---
 manim/mobject/svg/svg_mobject.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/manim/mobject/svg/svg_mobject.py b/manim/mobject/svg/svg_mobject.py
index bd494c0211..44dbbcb3cb 100644
--- a/manim/mobject/svg/svg_mobject.py
+++ b/manim/mobject/svg/svg_mobject.py
@@ -327,6 +327,9 @@ def apply_style_to_mobject(mob: VMobject, shape: se.GraphicObject) -> VMobject:
         shape
             The parsed SVG element.
         """
+        if shape.stroke.hexrgb is not None and (shape.stroke_width is None or shape.stroke_width == 0.0):
+            shape.stroke_width = 1.0
+        
         mob.set_style(
             stroke_width=shape.stroke_width,
             stroke_color=shape.stroke.hexrgb,

From 419ac1722866ee0e55e1367f46f4081e377b7316 Mon Sep 17 00:00:00 2001
From: "pre-commit-ci[bot]"
 <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Date: Wed, 26 Nov 2025 08:33:00 +0000
Subject: [PATCH 2/2] [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci
---
 manim/mobject/svg/svg_mobject.py | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/manim/mobject/svg/svg_mobject.py b/manim/mobject/svg/svg_mobject.py
index 44dbbcb3cb..da37486ce4 100644
--- a/manim/mobject/svg/svg_mobject.py
+++ b/manim/mobject/svg/svg_mobject.py
@@ -327,9 +327,11 @@ def apply_style_to_mobject(mob: VMobject, shape: se.GraphicObject) -> VMobject:
         shape
             The parsed SVG element.
         """
-        if shape.stroke.hexrgb is not None and (shape.stroke_width is None or shape.stroke_width == 0.0):
+        if shape.stroke.hexrgb is not None and (
+            shape.stroke_width is None or shape.stroke_width == 0.0
+        ):
             shape.stroke_width = 1.0
-        
+
         mob.set_style(
             stroke_width=shape.stroke_width,
             stroke_color=shape.stroke.hexrgb,