nanshe/nanshe/advanced_image_processing.py: Fix parameter whitespace alignment in merge_neuron_sets_repeatedly.
nanshe/nanshe/advanced_image_processing.py: Fix parameter whitespace alignment in merge_neuron_sets_repeatedly.

nanshe-org/nanshe,DudLab/nanshe,jakirkham/nanshe,DudLab/nanshe,jakirkham/nanshe,nanshe-org/nanshe