Remove doubled braces in non_exhaustive structs’ documentation text. #85657
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In commit 4b80687 (part of Rust 1.52.1) many calls to
write!(w,
were replaced withw.write_str(
, but this one contained braces that were doubled to escape them when taken as a format string, and so changing the call without changing the text caused them to become doubled in the final HTML output.I examined
print_item.rs
and the diff of that prior commit for any other occurrences of this mistake and I did not find any.