[ENH] Condensing the return conditions

[syedalimohsinbukhari]

These two conditions can be condensed together.

Solvers/src/num_solvers/iterative_solvers/function_root.py

Lines 143 to 150 in e642890

	f_x_new = f(x_new)
	if abs(f_x_new) < tolerance:
	break
	if f_x_new == 0:
	return root if get_all_values else root[-1]
	return root if get_all_values else root[-1]