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More precise phrasing of what ? expands to
As per the suggestion from @QuineDot in #65.
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# Converting Error Types
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The actual expansion of `?` is a little more complicated than previously indicated:
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The effective expansion of `?` is a little more complicated than previously indicated:
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```rust,ignore
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expression?
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```
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actually becomes
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works the same as
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```rust,ignore
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match expression {
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