remove another space here and there in the comment

Co-authored-by: Pg Biel <[email protected]>

Author: cobordism

manim/utils/tex_templates.py

@@ -51,7 +51,7 @@ class TexTemplateLibrary(object):
     """An instance of the TeX template used by 3b1b when using the use_ctex flag"""
 
     simple = _new_ams_template()
-    """ An instance of a simple TeX template with only basic AMS packages loaded """
+    """An instance of a simple TeX template with only basic AMS packages loaded"""
 
 
 # TexFontTemplates