tests: Format all Python code with black, except tests in basics subdir.

This adds the Python files in the tests/ directory to be formatted with
./tools/codeformat.py.  The basics/ subdirectory is excluded for now so we
aren't changing too much at once.

In a few places `# fmt: off`/`# fmt: on` was used where the code had
special formatting for readability or where the test was actually testing
the specific formatting.

tests/net_inet/test_tls_sites.py

@@ -6,6 +6,7 @@ try:
     import ussl as ssl
 except:
     import ssl
+
     # CPython only supports server_hostname with SSLContext
     ssl = ssl.SSLContext()
 
@@ -24,9 +25,9 @@ def test_one(site, opts):
         else:
             s = ssl.wrap_socket(s)
 
-        s.write(b"GET / HTTP/1.0\r\nHost: %s\r\n\r\n" % bytes(site, 'latin'))
+        s.write(b"GET / HTTP/1.0\r\nHost: %s\r\n\r\n" % bytes(site, "latin"))
         resp = s.read(4096)
-#        print(resp)
+        # print(resp)
 
     finally:
         s.close()
@@ -37,7 +38,7 @@ SITES = [
     "www.google.com",
     "api.telegram.org",
     {"host": "api.pushbullet.com", "sni": True},
-#    "w9rybpfril.execute-api.ap-southeast-2.amazonaws.com",
+    # "w9rybpfril.execute-api.ap-southeast-2.amazonaws.com",
     {"host": "w9rybpfril.execute-api.ap-southeast-2.amazonaws.com", "sni": True},
 ]
 

tests/net_inet/uasyncio_tcp_read_headers.py

@@ -22,7 +22,11 @@ async def http_get_headers(url):
         line = line.strip()
         if not line:
             break
-        if line.find(b"Date") == -1 and line.find(b"Modified") == -1 and line.find(b"Server") == -1:
+        if (
+            line.find(b"Date") == -1
+            and line.find(b"Modified") == -1
+            and line.find(b"Server") == -1
+        ):
             print(line)
 
     print("close")