From 29e5a8bc90948429c8de7d75cc508a7a827c4b98 Mon Sep 17 00:00:00 2001
From: libinglong <2376771274@qq.com>
Date: Sat, 17 Apr 2021 22:30:08 +0800
Subject: [PATCH] fix issue #1480

---
 manimlib/mobject/svg/tex_mobject.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/manimlib/mobject/svg/tex_mobject.py b/manimlib/mobject/svg/tex_mobject.py
index 8cebe1f5..99852a6c 100644
--- a/manimlib/mobject/svg/tex_mobject.py
+++ b/manimlib/mobject/svg/tex_mobject.py
@@ -181,7 +181,10 @@ class Tex(SingleStringTex):
         pattern = "|".join(patterns)
         pieces = []
         for s in tex_strings:
-            pieces.extend(re.split(pattern, s))
+            if pattern:
+                pieces.extend(re.split(pattern, s))
+            else:
+                pieces.append(s)
         return list(filter(lambda s: s, pieces))
 
     def break_up_by_substrings(self):