TypedDict overlap check has non-deterministic output

[srittau]

Bug Report

When running mypy primer in typeshed, we often get spurious output like this (from python/typeshed#14649):

discord.py (https://github.com/Rapptz/discord.py)
- discord/ext/commands/hybrid.py:508: error: Overlap between argument names and ** TypedDict items: "description", "name"  [misc]
+ discord/ext/commands/hybrid.py:508: error: Overlap between argument names and ** TypedDict items: "name", "description"  [misc]
- discord/ext/commands/hybrid.py:629: error: Overlap between argument names and ** TypedDict items: "description", "name"  [misc]
+ discord/ext/commands/hybrid.py:629: error: Overlap between argument names and ** TypedDict items: "name", "description"  [misc]

Expected Behavior

It would be helpful if the argument order in the output would be deterministic to avoid this spurious diff.

Your Environment

• Mypy version used: 1.16.1
• Mypy command-line flags:
• Mypy configuration options from mypy.ini (and other config files):
• Python version used: 3.13

[srittau]

And it seems this was already fixed in #19666 by @cdce8p.