Meshing: Mage: Fix pep8.

src/Meshing/Mage.py

@@ -300,7 +300,9 @@ class MeshingWithMageMailleurTT(AMeshingTool):
 
             errors = str(proc.readAllStandardError())
             if len(errors) != 0:
-                logger.error(f"{logger_color_red()}{errors}{logger_color_reset()}")
+                logger.error(
+                    f"{logger_color_red()}{errors}{logger_color_reset()}"
+                )
             else:
                 self.import_m_file(reach, m_file)
             return reach