Fix flake8 errors for Python code

[bwignall]

Errors currently in main:

Run flake8 . --ignore E501,W503,E203,E731,B011,SIM119,SIM106
./49_Hockey/python/hockey.py:130:8: F841 local variable 'wants_it' is assigned to but never used
./49_Hockey/python/hockey.py:232:15: ISC003 explicitly concatenated string should be implicitly concatenated
./49_Hockey/python/hockey.py:377:15: ISC003 explicitly concatenated string should be implicitly concatenated
./49_Hockey/python/hockey.py:405:19: ISC003 explicitly concatenated string should be implicitly concatenated
./49_Hockey/python/hockey.py:406:19: ISC003 explicitly concatenated string should be implicitly concatenated
./49_Hockey/python/hockey.py:410:19: ISC003 explicitly concatenated string should be implicitly concatenated
./49_Hockey/python/hockey.py:411:19: ISC003 explicitly concatenated string should be implicitly concatenated
./49_Hockey/python/hockey.py:414:19: ISC003 explicitly concatenated string should be implicitly concatenated
./49_Hockey/python/hockey.py:450:19: ISC003 explicitly concatenated string should be implicitly concatenated
./49_Hockey/python/hockey.py:454:19: ISC003 explicitly concatenated string should be implicitly concatenated
./49_Hockey/python/hockey.py:458:19: ISC003 explicitly concatenated string should be implicitly concatenated
./49_Hockey/python/hockey.py:463:19: ISC003 explicitly concatenated string should be implicitly concatenated
./72_Queen/python/queen.py:177:17: E121 continuation line under-indented for hanging indent
./72_Queen/python/queen.py:177:17: E125 continuation line with same indent as next logical line
./65_Nim/python/Traditional_NIM.py:99:12: F841 local variable 'end' is assigned to but never used
./17_Bullfight/python/bullfight.py:32:16: F841 local variable 'player_was_killed' is assigned to but never used
./89_Tic-Tac-Toe/python/TicTacToe_Hard.py:174:21: ISC003 explicitly concatenated string should be implicitly concatenated
./59_Lunar_LEM_Rocket/python/lunar.py:327:16: F841 local variable 'landed' is assigned to but never used
./69_Pizza/python/pizza.py:158:8: F841 local variable 'more_directions' is assigned to but never used
./64_Nicomachus/python/nicomachus.py:46:8: F841 local variable 'response' is assigned to but never used
./03_Animal/python/animal.py:134:9: F841 local variable 'keep_playing' is assigned to but never used
./07_Basketball/python/basketball.py:142:27: ISC003 explicitly concatenated string should be implicitly concatenated
./07_Basketball/python/basketball.py:188:31: ISC003 explicitly concatenated string should be implicitly concatenated
./07_Basketball/python/basketball.py:273:31: ISC003 explicitly concatenated string should be implicitly concatenated
./07_Basketball/python/basketball.py:313:27: ISC003 explicitly concatenated string should be implicitly concatenated
./07_Basketball/python/basketball.py:320:27: ISC003 explicitly concatenated string should be implicitly concatenated