Tweak comment about saving network pdf for debugging.

Author: rwest

rmgpy/rmg/pdep.py

@@ -882,8 +882,9 @@ def update(self, reaction_model, pdep_settings, requires_rms=False):
             K = self.calculate_rate_coefficients(Tlist, Plist, method)
         except InvalidMicrocanonicalRateError:
             if output_directory:
-                job.draw(output_directory, filename_stem=f'network{self.index:d}_{len(self.isomers)}', file_format='pdf')
-                logging.info(f"Network {self.index} has been drawn and saved as a pdf in {output_directory}.")
+                filename_stem = f'network{self.index:d}_{len(self.isomers):d}'
+                job.draw(output_directory, filename_stem=filename_stem, file_format='pdf')
+                logging.info(f"Network {self.index} has been drawn and saved as {filename_stem}.pdf in {output_directory} to aid debugging.")
             raise
 
         # Generate PDepReaction objects