fix formant and linting

src/nile/base_project/tests/test_contract.py

@@ -1,6 +1,6 @@
+"""contract.cairo test file."""
 import os
 import pytest
-
 from starkware.starknet.testing.starknet import Starknet
 
 # The path to the contract source code.
@@ -11,6 +11,7 @@
 # decorator and the ``async`` keyword are needed.
 @pytest.mark.asyncio
 async def test_increase_balance():
+    """Test increase_balance method."""
     # Create a new Starknet class that simulates the StarkNet
     # system.
     starknet = await Starknet.empty()

src/nile/commands/init.py

@@ -1,6 +1,7 @@
 """Command to kickstart a Nile project."""
+import os
 import subprocess
-import sys, os
+import sys
 from distutils.dir_util import copy_tree
 
 from nile.commands.install import install_command
@@ -25,7 +26,7 @@ def init_command():
 
     # create project directories
     print("🗄  Creating project directory tree")
-    copy_tree(os.path.join(os.path.dirname(__file__), "../base_project"), '.')
+    copy_tree(os.path.join(os.path.dirname(__file__), "../base_project"), ".")
 
     print("⛵️ Nile project ready! Try running:")
     print("")