fix type of return in docstring of evolution_instruction
@@ -246,7 +246,7 @@ def evolution_instruction(pauli_list, evo_time, num_time_slices,
qc.data reference repetition for slicing
barrier (bool, optional): whether or not add barrier for every slice
Returns:
- InstructionSet: The InstructionSet corresponding to specified evolution.
+ Instruction: The Instruction corresponding to specified evolution.
Raises:
AquaError: power must be an integer and greater or equal to 1
ValueError: Unrecognized pauli
