Fix bug introduced in Tex rendering via #2574 (#2587)

* Bugfix

* Changes to log data

* Add test

* Seperate test

Author: ad-chaos

manim/utils/tex_file_writing.py

@@ -84,7 +84,10 @@ def generate_tex_file(expression, environment=None, tex_template=None):
 
     result = os.path.join(tex_dir, tex_hash(output)) + ".tex"
     if not os.path.exists(result):
-        logger.info(f"Writing {expression} to %(path)s", {"path": f"{result}"})
+        logger.info(
+            "Writing %(expression)s to %(path)s",
+            {"expression": expression, "path": f"{result}"},
+        )
         with open(result, "w", encoding="utf-8") as outfile:
             outfile.write(output)
     return result

tests/control_data/logs_data/bad_tex_scene_BadTex.txt

@@ -1,5 +1,5 @@
 {"levelname": "INFO", "module": "logger_utils", "message": "Log file will be saved in <>"}
-{"levelname": "INFO", "module": "tex_file_writing", "message": "Writing \\frac{1}{0} to <>"}
+{"levelname": "INFO", "module": "tex_file_writing", "message": "Writing <> to <>"}
 {"levelname": "ERROR", "module": "tex_file_writing", "message": "LaTeX compilation error: LaTeX Error: File `notapackage.sty' not found.\n"}
 {"levelname": "ERROR", "module": "tex_file_writing", "message": "Context of error: \n\\documentclass[preview]{standalone}\n-> \\usepackage{notapackage}\n\\begin{document}\n\n\\begin{center}\n"}
 {"levelname": "INFO", "module": "tex_file_writing", "message": "You do not have package notapackage.sty installed."}

tests/test_texmobject.py

@@ -33,6 +33,11 @@ def test_tex():
     assert Path(config.media_dir, "Tex", "983949cac5bdd272.svg").exists()
 
 
+def test_percent_char_rendering():
+    Tex(r"\%")
+    assert Path(config.media_dir, "Tex", "ce6e53f2d9c537bb.tex").exists()
+
+
 def test_tex_whitespace_arg():
     """Check that correct number of submobjects are created per string with whitespace separator"""
     separator = "\t"