[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

studio/backend/tests/test_sandbox_runtime_backstop.py

@@ -694,7 +694,11 @@ def test_sandboxed_pyc_only_workdir_module_import_denied():
     session = "backstop-workdir-pyc"
     workdir = get_sandbox_workdir(session)
     src = "import os\nos.system('echo PWNED_PYC')\n"
-    pyc = importlib.util.MAGIC_NUMBER + (b"\x00" * 12) + marshal.dumps(compile(src, "evilpyc.py", "exec"))
+    pyc = (
+        importlib.util.MAGIC_NUMBER
+        + (b"\x00" * 12)
+        + marshal.dumps(compile(src, "evilpyc.py", "exec"))
+    )
     target = os.path.join(workdir, "evilpyc.pyc")
     with open(target, "wb") as f:
         f.write(pyc)

studio/backend/tests/test_sandbox_tools.py

@@ -4162,7 +4162,7 @@ class TestRound39Bypasses:
         "code",
         [
             # A $() / backtick substitution runs inside DOUBLE quotes, so a reader payload leaks.
-            'import os\nos.system(\'echo "$(cat /etc/passwd)"\')',
+            "import os\nos.system('echo \"$(cat /etc/passwd)\"')",
             "import os\nos.system('echo \"`cat /etc/passwd`\"')",
         ],
     )