Auto merge of #138271 - mu001999-contrib:fix-138234, r=jackh726

Keep space if arg does not follow punctuation when lint unused parens

Fixes rust-lang/rust#138234

If the arg follows punctuation, still pass `left_pos` with `None` and no space will be added, else then pass `left_pos` with `Some(arg.span.lo())`, so that we can add the space as expected.

And `emit_unused_delims` can make sure no more space will be added if the expr follows space.

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Edited:

Directly use the `value_span` to check whether the expr removed parens will follow identifier or be followed by identifier.

Author: bors