diff --git a/rendercv/renderer.py b/rendercv/renderer.py
index 2dd3b7c..9db5081 100644
--- a/rendercv/renderer.py
+++ b/rendercv/renderer.py
@@ -113,12 +113,12 @@ class LaTeXFile(TemplatedFile):
         data_model: dm.RenderCVDataModel,
         environment: jinja2.Environment,
     ):
-        latexfile_data_model = copy.deepcopy(data_model)
+        latex_file_data_model = copy.deepcopy(data_model)
         transformed_sections = transform_markdown_sections_to_latex_sections(
-            latexfile_data_model.cv.sections_input
+            latex_file_data_model.cv.sections_input
         )
-        latexfile_data_model.cv.sections_input = transformed_sections
-        super().__init__(latexfile_data_model, environment)
+        latex_file_data_model.cv.sections_input = transformed_sections
+        super().__init__(latex_file_data_model, environment)
 
     def render_templates(self) -> tuple[str, str, list[tuple[str, list[str], str]]]:
         """Render and return all the templates for the $\\LaTeX$ file.
@@ -138,7 +138,7 @@ class LaTeXFile(TemplatedFile):
             entries: list[str] = []
             for i, entry in enumerate(section.entries):
                 is_first_entry = i == 0
-                
+
                 entries.append(
                     self.template(
                         section.entry_type,
@@ -183,15 +183,19 @@ class LaTeXFile(TemplatedFile):
         # ones with \textnormal:
 
         # Find all the nested commands:
-        nested_commands = re.findall(r"\\textbf{[^}]*?(\\textbf{.*?})", result)
-        nested_commands += re.findall(r"\\textit{[^}]*?(\\textit{.*?})", result)
-        nested_commands += re.findall(r"\\underline{[^}]*?(\\underline{.*?})", result)
+        nested_commands = re.findall(
+            r"\\textbf{[^}]*?(\\textbf{.*?})|\\textit{[^}]*?(\\textit{.*?})"
+            r"|\\underline{[^}]*?(\\underline{.*?})",
+            result,
+        )
 
         # Replace the inner commands with \textnormal:
         for nested_command in nested_commands:
-            new_command = nested_command.replace("textbf", "textnormal")
-            new_command = new_command.replace("textit", "textnormal")
-            new_command = new_command.replace("underline", "textnormal")
+            new_command = (
+                nested_command.replace("textbf", "textnormal")
+                .replace("textit", "textnormal")
+                .replace("underline", "textnormal")
+            )
             result = result.replace(nested_command, new_command)
 
         return result
@@ -855,7 +859,8 @@ def copy_theme_files_to_output_directory(
                 )
 
     for theme_file in theme_directory_path.iterdir():
-        if not ("j2.tex" in theme_file.name or "py" in theme_file.name):
+        dont_copy_files_with_these_extensions = [".j2.tex", ".py"]
+        if theme_file.suffix not in dont_copy_files_with_these_extensions:
             if theme_file.is_dir():
                 shutil.copytree(
                     str(theme_file),