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Auto merge of rust-lang#132251 - jieyouxu:rollup-mtv9mpd, r=jieyouxu
Rollup of 7 pull requests Successful merges: - rust-lang#131633 (error on alignments greater than `isize::MAX`) - rust-lang#132086 (Tweak E0277 highlighting and "long type" path printing) - rust-lang#132220 (Add GUI regression test for doc struct fields margins) - rust-lang#132225 (Dynamically link run-make support) - rust-lang#132227 (Pass constness with span into lower_poly_trait_ref) - rust-lang#132242 (Support `char::is_digit` in const contexts.) - rust-lang#132243 (Remove `ObligationCause::span()` method) r? `@ghost` `@rustbot` modify labels: rollup
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core/src/char/methods.rs

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@@ -320,8 +320,9 @@ impl char {
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/// '1'.is_digit(37);
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/// ```
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#[stable(feature = "rust1", since = "1.0.0")]
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#[rustc_const_unstable(feature = "const_char_is_digit", issue = "132241")]
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#[inline]
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pub fn is_digit(self, radix: u32) -> bool {
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pub const fn is_digit(self, radix: u32) -> bool {
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self.to_digit(radix).is_some()
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}
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