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/views/home.py

@@ -123,7 +123,7 @@ def get_bot_types(user_profile: Optional[UserProfile]) -> List[Dict[str, object]
         bot_types.append({
             'type_id': type_id,
             'name': name,
-            'allowed': type_id in user_profile.allowed_bot_types
+            'allowed': type_id in user_profile.allowed_bot_types,
         })
     return bot_types
 
@@ -159,7 +159,7 @@ def home_real(request: HttpRequest) -> HttpResponse:
             'zerver/insecure_desktop_app.html',
             context={
                 "auto_update_broken": auto_update_broken,
-            }
+            },
         )
     (unsupported_browser, browser_name) = is_unsupported_browser(client_user_agent)
     if unsupported_browser:
@@ -168,7 +168,7 @@ def home_real(request: HttpRequest) -> HttpResponse:
             'zerver/unsupported_browser.html',
             context={
                 "browser_name": browser_name,
-            }
+            },
         )
 
     # We need to modify the session object every two weeks or it will expire.
@@ -339,7 +339,7 @@ def home_real(request: HttpRequest) -> HttpResponse:
                                'embedded': narrow_stream is not None,
                                'invite_as': PreregistrationUser.INVITE_AS,
                                'max_file_upload_size_mib': settings.MAX_FILE_UPLOAD_SIZE,
-                               },)
+                               })
     patch_cache_control(response, no_cache=True, no_store=True, must_revalidate=True)
     return response