Changed mixed indentation to four spaces

Put `test/rpc_wallet_tests.cpp` through clang-format.

src/test/rpc_wallet_tests.cpp

@@ -177,7 +177,6 @@ BOOST_AUTO_TEST_CASE(rpc_wallet)
     Array arr = retValue.get_array();
     BOOST_CHECK(arr.size() > 0);
     BOOST_CHECK(CBitcoinAddress(arr[0].get_str()).Get() == demoAddress.Get());
-
 }