diff --git a/lib/wrap_utils.py b/lib/wrap_utils.py
index 231dff8..ebf4f61 100755
--- a/lib/wrap_utils.py
+++ b/lib/wrap_utils.py
@@ -7,10 +7,9 @@
 """
 
 
-def create_func_def_string(base_func_name,
-                           wrap_func_name,
-                           func_body_template,
-                           replace_dict):
+def create_func_def_string(
+    base_func_name, wrap_func_name, func_body_template, replace_dict
+):
     r"""
     Create and return a complete function definition as a string.  The caller may run "exec" on the resulting
     string to create the desired function.
@@ -41,10 +40,10 @@
     func_def.insert(0, func_def_line)
     # Make sure the replace_dict has a 'call_line'/call_line pair so that any '<call_line>' text gets
     # replaced as intended.
-    replace_dict['call_line'] = call_line
+    replace_dict["call_line"] = call_line
 
     # Do the replacements.
     for key, value in replace_dict.items():
         func_def = [w.replace("<" + key + ">", value) for w in func_def]
 
-    return '\n'.join(func_def) + "\n"
+    return "\n".join(func_def) + "\n"