Errors in multiline implicit string concatenation not properly suppressed

[rexledesma]

Describe the Bug

When you write a # pyrefly: ignore comment above a multi-line implicit string concatenation, only the first error is covered, even though this is a single construct.

# lol.py                                                                                     
x = (                                                                                                     
    # pyrefly: ignore [bad-index]                                                                         
    f"{d['foo']}\n"
    f"{d['bar']}"
)

In pyrefly@0.60.0, this results in an error in pyrefly check, even though the LSP does not error:

❯ uv run pyrefly check lol.py
ERROR Cannot index into `Literal['str']` [bad-index]
 --> lol.py:6:8
  |
6 |     f"{d['bar']}"
  |        ^^^^^^^^
  |
  No matching overload found for function `str.__getitem__` called with arguments: (Literal['bar'])
  Possible overloads:
  (key: SupportsIndex | slice[SupportsIndex | None, SupportsIndex | None, SupportsIndex | Unknown | None], /) -> LiteralString [closest match]
  (key: SupportsIndex | slice[SupportsIndex | None, SupportsIndex | None, SupportsIndex | Unknown | None], /) -> str
 INFO 1 error (1 suppressed)

I would expect one of the following:

• The multiline string is treated as a single construct,
• When running uv run pyrefly suppress lol.py, each component of the multiline string receive their own suppressions. However, this does not happen.

❯ uv run pyrefly suppress lol.py

 INFO 1 error (1 suppressed)
 INFO Inserting error suppressions...
 INFO Finished suppressing errors in 1/1 files

❯ cat lol.py
─────┬──────────────────────────────────────────────────────────────────────────────────────────────────────────
     │ File: lol.py
─────┼──────────────────────────────────────────────────────────────────────────────────────────────────────────
   1 │ d = "str"
   2 │
   3 │ x = (
     │
   4 │     # pyrefly: ignore [bad-index]
   5 │     f"{d['foo']}\n"
   6 │     f"{d['bar']}"
   7 │ )
─────┴──────────────────────────────────────────────────────────────────────────────────────────────────────────

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