Replace yapf with black

tests/conftest.py

@@ -14,18 +14,20 @@ from cmake_language_server.server import CMakeLanguageServer
 
 @pytest.fixture()
 def cmake_build(shared_datadir):
-    source = shared_datadir / 'cmake'
-    build = source / 'build'
+    source = shared_datadir / "cmake"
+    build = source / "build"
     build.mkdir()
-    p = run(['cmake', str(source)],
-            cwd=build,
-            stdout=PIPE,
-            stderr=PIPE,
-            universal_newlines=True)
+    p = run(
+        ["cmake", str(source)],
+        cwd=build,
+        stdout=PIPE,
+        stderr=PIPE,
+        universal_newlines=True,
+    )
     if p.returncode != 0:
-        logging.error('env:\n' + pprint.pformat(os.environ))
-        logging.error('stdout:\n' + p.stdout)
-        logging.error('stderr:\n' + p.stderr)
+        logging.error("env:\n" + pprint.pformat(os.environ))
+        logging.error("stdout:\n" + p.stdout)
+        logging.error("stderr:\n" + p.stderr)
         raise RuntimeError("CMake failed")
     yield build
 
@@ -40,7 +42,7 @@ def client_server():
         # disable `close()` to avoid error messages
         close = ls.loop.close
         ls.loop.close = lambda: None
-        ls.start_io(os.fdopen(fdr, 'rb'), os.fdopen(fdw, 'wb'))
+        ls.start_io(os.fdopen(fdr, "rb"), os.fdopen(fdw, "wb"))
         ls.loop.close = close
 
     server = CMakeLanguageServer(asyncio.new_event_loop())