bug#73355: 29.4; eglot-rename reports success when it shouldn't

[Eli Zaretskii <eliz@gnu.org>]

> From: Joost Kremers <joostkremers@fastmail.fm>
> Date: Thu, 19 Sep 2024 14:01:08 +0200
> 
> 
> I tried to use 'eglot-rename' to rename a variable to a name that already
> existed in the relevant function. The change was not applied but Eglot
> nonetheless reported "[eglot] Edit successful!".
> 
> This was in a Python buffer, using python-ts-mode and basedpyright
> (v1.17.1) as language server. The relevant code snippet:
> 
> ```
> def main():
>     sizes = [100, 1000, 10000]
>     results: dict[str, list[float]] = {
>         "Linear search": [],
>         "Binary search": [],
>         "Interpolation search": [],
>     }
>     for size in sizes:
>         seq: list[int] = sorted([random.randint(0, 10000) for _ in range(size)])
>         x = random.choice(arr)
>         results["Linear search"].append(measure_time(linear_search, arr, x))
>         results["Binary search"].append(measure_time(binary_search, arr, x))
>         results["Interpolation search"].append(
>             measure_time(interpolation_search, arr, x)
>         )
> ```
> 
> Note the 'seq' variable in the first line of the for loop, and the 'arr'
> variable in the three '.append' invocations. With point on the first 'arr',
> calling eglot-rename and giving 'seq' as the new name, Eglot refuses to
> rename the three occurrences of 'arr' (which makes sense, given that a
> variable with that name obviously already exists), but still reports
> success.
> 
> (Note that there is no problem if the 'seq' above is also 'arr'. Then
> renaming works fine.)

Adding João.