python: Use trailing commas consistently.

Automatically generated by the following script, based on the output
of lint with flake8-comma:

import re
import sys

last_filename = None
last_row = None
lines = []

for msg in sys.stdin:
    m = re.match(
        r"\x1b\[35mflake8    \|\x1b\[0m \x1b\[1;31m(.+):(\d+):(\d+): (\w+)", msg
    )
    if m:
        filename, row_str, col_str, err = m.groups()
        row, col = int(row_str), int(col_str)

        if filename == last_filename:
            assert last_row != row
        else:
            if last_filename is not None:
                with open(last_filename, "w") as f:
                    f.writelines(lines)

            with open(filename) as f:
                lines = f.readlines()
            last_filename = filename
        last_row = row

        line = lines[row - 1]
        if err in ["C812", "C815"]:
            lines[row - 1] = line[: col - 1] + "," + line[col - 1 :]
        elif err in ["C819"]:
            assert line[col - 2] == ","
            lines[row - 1] = line[: col - 2] + line[col - 1 :].lstrip(" ")

if last_filename is not None:
    with open(last_filename, "w") as f:
        f.writelines(lines)

Signed-off-by: Anders Kaseorg <anders@zulipchat.com>

zerver/lib/test_fixtures.py

@@ -69,7 +69,7 @@ class Database:
         self.migration_status_file = 'migration_status_' + platform
         self.migration_status_path = os.path.join(
             UUID_VAR_DIR,
-            self.migration_status_file
+            self.migration_status_file,
         )
         self.migration_digest_file = "migrations_hash_" + database_name
 
@@ -290,7 +290,7 @@ def get_migration_status(**options: Any) -> str:
     app_label = options['app_label'] if options.get('app_label') else None
     db = options.get('database', DEFAULT_DB_ALIAS)
     out = StringIO()
-    command_args = ['--list', ]
+    command_args = ['--list']
     if app_label:
         command_args.append(app_label)