Bug: invalid NumPy API usage (np.concat does not exist)

[abdallalahwani]

In data/generate_tsp_with_multirun_2opt.py (lines 79–80), the code uses
np.concat, which does not exist in NumPy.

Current code:

tours = np.concat([result[0] for result in results_list], axis=0)
costs = np.concat([result[1] for result in results_list], axis=0)

This raises:
AttributeError: module 'numpy' has no attribute 'concat'


Expected:
tours = np.concatenate([result[0] for result in results_list], axis=0)
costs = np.concatenate([result[1] for result in results_list], axis=0)