Spelling mistake on line 221 of FSRN-RNN train.py

[Astronaut Alec]

I do not have git access to modify this code but line 221, should be changed from monitor = "val_loss" to monitor = "val loss",

the comma is necessary to run the code.

initial version

checkpoint = ModelCheckpoint(weight_filename,
                             monitor = "val_loss"
                             save_best_only = True,
                             save_weights_only = True)

corrected version

checkpoint = ModelCheckpoint(weight_filename,
                             monitor = "val_loss",
                             save_best_only = True,
                             save_weights_only = True)