resolve some new lint issues detected by newer version, and a few looked over ones

test_libs/pyspec/eth2spec/test/block_processing/test_process_deposit.py

@@ -138,7 +138,7 @@ def test_wrong_deposit_for_deposit_count(state):
         pubkey_1,
         privkey_1,
         spec.MAX_EFFECTIVE_BALANCE,
-        withdrawal_credentials=b'\x00'*32,
+        withdrawal_credentials=b'\x00' * 32,
         signed=True,
     )
     deposit_count_1 = len(deposit_data_leaves)
@@ -153,7 +153,7 @@ def test_wrong_deposit_for_deposit_count(state):
         pubkey_2,
         privkey_2,
         spec.MAX_EFFECTIVE_BALANCE,
-        withdrawal_credentials=b'\x00'*32,
+        withdrawal_credentials=b'\x00' * 32,
         signed=True,
     )
 

test_libs/pyspec/eth2spec/utils/hash_function.py

@@ -1,4 +1,5 @@
 from hashlib import sha256
 
 
-def hash(x): return sha256(x).digest()
+def hash(x):
+    return sha256(x).digest()

test_libs/pyspec/eth2spec/utils/ssz/ssz_impl.py

@@ -57,7 +57,7 @@ def serialize(obj, typ=None):
     if is_basic_type(typ):
         return serialize_basic(obj, typ)
     elif is_list_kind(typ) or is_vector_kind(typ):
-        return encode_series(obj, [read_elem_type(typ)]*len(obj))
+        return encode_series(obj, [read_elem_type(typ)] * len(obj))
     elif is_container_type(typ):
         return encode_series(obj.get_field_values(), typ.get_field_types())
     else: