Fix typos “an”→“a” and a few different ones that appeared in the same search

compiler/rustc_codegen_llvm/src/intrinsic.rs

@@ -1031,7 +1031,7 @@ fn generic_simd_intrinsic(
         // vector mask and returns an unsigned integer containing the most
         // significant bit (MSB) of each lane.
 
-        // If the vector has less than 8 lanes, an u8 is returned with zeroed
+        // If the vector has less than 8 lanes, a u8 is returned with zeroed
         // trailing bits.
         let expected_int_bits = in_len.max(8);
         match ret_ty.kind() {

compiler/rustc_hir/src/hir.rs

@@ -974,7 +974,7 @@ pub enum PatKind<'hir> {
     /// Invariant: `pats.len() >= 2`.
     Or(&'hir [Pat<'hir>]),
 
-    /// A path pattern for an unit struct/variant or a (maybe-associated) constant.
+    /// A path pattern for a unit struct/variant or a (maybe-associated) constant.
     Path(QPath<'hir>),
 
     /// A tuple pattern (e.g., `(a, b)`).

compiler/rustc_lint_defs/src/builtin.rs

@@ -3371,7 +3371,7 @@ declare_lint! {
 }
 
 declare_lint! {
-    /// The `unsupported_calling_conventions` lint is output whenever there is an use of the
+    /// The `unsupported_calling_conventions` lint is output whenever there is a use of the
     /// `stdcall`, `fastcall`, `thiscall`, `vectorcall` calling conventions (or their unwind
     /// variants) on targets that cannot meaningfully be supported for the requested target.
     ///

compiler/rustc_metadata/src/rmeta/decoder.rs

@@ -62,7 +62,7 @@ crate struct CrateMetadata {
     // --- Some data pre-decoded from the metadata blob, usually for performance ---
     /// Properties of the whole crate.
     /// NOTE(eddyb) we pass `'static` to a `'tcx` parameter because this
-    /// lifetime is only used behind `Lazy`, and therefore acts like an
+    /// lifetime is only used behind `Lazy`, and therefore acts like a
     /// universal (`for<'tcx>`), that is paired up with whichever `TyCtxt`
     /// is being used to decode those values.
     root: CrateRoot<'static>,

compiler/rustc_middle/src/mir/interpret/value.rs

@@ -376,27 +376,27 @@ impl<'tcx, Tag: Provenance> Scalar<Tag> {
         self.to_bits(sz)
     }
 
-    /// Converts the scalar to produce an `u8`. Fails if the scalar is a pointer.
+    /// Converts the scalar to produce a `u8`. Fails if the scalar is a pointer.
     pub fn to_u8(self) -> InterpResult<'static, u8> {
         self.to_unsigned_with_bit_width(8).map(|v| u8::try_from(v).unwrap())
     }
 
-    /// Converts the scalar to produce an `u16`. Fails if the scalar is a pointer.
+    /// Converts the scalar to produce a `u16`. Fails if the scalar is a pointer.
     pub fn to_u16(self) -> InterpResult<'static, u16> {
         self.to_unsigned_with_bit_width(16).map(|v| u16::try_from(v).unwrap())
     }
 
-    /// Converts the scalar to produce an `u32`. Fails if the scalar is a pointer.
+    /// Converts the scalar to produce a `u32`. Fails if the scalar is a pointer.
     pub fn to_u32(self) -> InterpResult<'static, u32> {
         self.to_unsigned_with_bit_width(32).map(|v| u32::try_from(v).unwrap())
     }
 
-    /// Converts the scalar to produce an `u64`. Fails if the scalar is a pointer.
+    /// Converts the scalar to produce a `u64`. Fails if the scalar is a pointer.
     pub fn to_u64(self) -> InterpResult<'static, u64> {
         self.to_unsigned_with_bit_width(64).map(|v| u64::try_from(v).unwrap())
     }
 
-    /// Converts the scalar to produce an `u128`. Fails if the scalar is a pointer.
+    /// Converts the scalar to produce a `u128`. Fails if the scalar is a pointer.
     pub fn to_u128(self) -> InterpResult<'static, u128> {
         self.to_unsigned_with_bit_width(128)
     }

compiler/rustc_middle/src/mir/tcx.rs

@@ -265,7 +265,7 @@ impl BorrowKind {
             BorrowKind::Shared => hir::Mutability::Not,
 
             // We have no type corresponding to a unique imm borrow, so
-            // use `&mut`. It gives all the capabilities of an `&uniq`
+            // use `&mut`. It gives all the capabilities of a `&uniq`
             // and hence is a safe "over approximation".
             BorrowKind::Unique => hir::Mutability::Mut,
 

compiler/rustc_middle/src/mir/visit.rs

@@ -1202,7 +1202,7 @@ pub enum NonUseContext {
     StorageDead,
     /// User type annotation assertions for NLL.
     AscribeUserTy,
-    /// The data of an user variable, for debug info.
+    /// The data of a user variable, for debug info.
     VarDebugInfo,
 }
 

compiler/rustc_middle/src/query/mod.rs

@@ -1733,7 +1733,7 @@ rustc_queries! {
     }
 
     /// Performs an HIR-based well-formed check on the item with the given `HirId`. If
-    /// we get an `Umimplemented` error that matches the provided `Predicate`, return
+    /// we get an `Unimplemented` error that matches the provided `Predicate`, return
     /// the cause of the newly created obligation.
     ///
     /// This is only used by error-reporting code to get a better cause (in particular, a better

compiler/rustc_middle/src/ty/closure.rs

@@ -434,7 +434,7 @@ impl BorrowKind {
             ImmBorrow => hir::Mutability::Not,
 
             // We have no type corresponding to a unique imm borrow, so
-            // use `&mut`. It gives all the capabilities of an `&uniq`
+            // use `&mut`. It gives all the capabilities of a `&uniq`
             // and hence is a safe "over approximation".
             UniqueImmBorrow => hir::Mutability::Mut,
         }

compiler/rustc_middle/src/ty/codec.rs

@@ -209,7 +209,7 @@ where
 impl<'tcx, D: TyDecoder<'tcx>> Decodable<D> for Ty<'tcx> {
     #[allow(rustc::usage_of_ty_tykind)]
     fn decode(decoder: &mut D) -> Result<Ty<'tcx>, D::Error> {
-        // Handle shorthands first, if we have an usize > 0x80.
+        // Handle shorthands first, if we have a usize > 0x80.
         if decoder.positioned_at_shorthand() {
             let pos = decoder.read_usize()?;
             assert!(pos >= SHORTHAND_OFFSET);
@@ -228,7 +228,7 @@ impl<'tcx, D: TyDecoder<'tcx>> Decodable<D> for Ty<'tcx> {
 impl<'tcx, D: TyDecoder<'tcx>> Decodable<D> for ty::Binder<'tcx, ty::PredicateKind<'tcx>> {
     fn decode(decoder: &mut D) -> Result<ty::Binder<'tcx, ty::PredicateKind<'tcx>>, D::Error> {
         let bound_vars = Decodable::decode(decoder)?;
-        // Handle shorthands first, if we have an usize > 0x80.
+        // Handle shorthands first, if we have a usize > 0x80.
         Ok(ty::Binder::bind_with_vars(
             if decoder.positioned_at_shorthand() {
                 let pos = decoder.read_usize()?;

compiler/rustc_middle/src/ty/sty.rs

@@ -239,7 +239,7 @@ static_assert_size!(TyKind<'_>, 32);
 ///   implements `CK<(u32, u32), Output = u32>`, where `CK` is the trait
 ///   specified above.
 /// - U is a type parameter representing the types of its upvars, tupled up
-///   (borrowed, if appropriate; that is, if an U field represents a by-ref upvar,
+///   (borrowed, if appropriate; that is, if a U field represents a by-ref upvar,
 ///    and the up-var has the type `Foo`, then that field of U will be `&Foo`).
 ///
 /// So, for example, given this function:

compiler/rustc_mir/src/interpret/validity.rs

@@ -857,7 +857,7 @@ impl<'rt, 'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> ValueVisitor<'mir, 'tcx, M>
                 // types above, in `visit_primitive`.
                 // In run-time mode, we accept pointers in here.  This is actually more
                 // permissive than a per-element check would be, e.g., we accept
-                // an &[u8] that contains a pointer even though bytewise checking would
+                // a &[u8] that contains a pointer even though bytewise checking would
                 // reject it.  However, that's good: We don't inherently want
                 // to reject those pointers, we just do not have the machinery to
                 // talk about parts of a pointer.

compiler/rustc_mir/src/transform/const_prop.rs

@@ -145,7 +145,7 @@ impl<'tcx> MirPass<'tcx> for ConstProp {
 
         // FIXME(oli-obk, eddyb) Optimize locals (or even local paths) to hold
         // constants, instead of just checking for const-folding succeeding.
-        // That would require an uniform one-def no-mutation analysis
+        // That would require a uniform one-def no-mutation analysis
         // and RPO (or recursing when needing the value of a local).
         let mut optimization_finder = ConstPropagator::new(body, dummy_body, tcx);
         optimization_finder.visit_body(body);

compiler/rustc_mir/src/transform/rustc_peek.rs

@@ -92,7 +92,7 @@ impl<'tcx> MirPass<'tcx> for SanityCheck {
 /// "rustc_peek: bit not set".
 ///
 /// The intention is that one can write unit tests for dataflow by
-/// putting code into an UI test and using `rustc_peek` to
+/// putting code into a UI test and using `rustc_peek` to
 /// make observations about the results of dataflow static analyses.
 ///
 /// (If there are any calls to `rustc_peek` that do not match the

compiler/rustc_mir_build/src/build/expr/into.rs

@@ -208,7 +208,7 @@ impl<'a, 'tcx> Builder<'a, 'tcx> {
                     );
                     this.diverge_from(loop_block);
 
-                    // The “return” value of the loop body must always be an unit. We therefore
+                    // The “return” value of the loop body must always be a unit. We therefore
                     // introduce a unit temporary as the destination for the loop body.
                     let tmp = this.get_unit_temp();
                     // Execute the body, branching back to the test.

compiler/rustc_mir_build/src/thir/cx/expr.rs

@@ -788,7 +788,7 @@ impl<'tcx> Cx<'tcx> {
                 self.user_substs_applied_to_ty_of_hir_id(hir_id)
             }
 
-            // `Self` is used in expression as a tuple struct constructor or an unit struct constructor
+            // `Self` is used in expression as a tuple struct constructor or a unit struct constructor
             Res::SelfCtor(_) => self.user_substs_applied_to_ty_of_hir_id(hir_id),
 
             _ => bug!("user_substs_applied_to_res: unexpected res {:?} at {:?}", res, hir_id),

compiler/rustc_span/src/source_map.rs

@@ -100,7 +100,7 @@ pub trait FileLoader {
     /// Query the existence of a file.
     fn file_exists(&self, path: &Path) -> bool;
 
-    /// Read the contents of an UTF-8 file into memory.
+    /// Read the contents of a UTF-8 file into memory.
     fn read_file(&self, path: &Path) -> io::Result<String>;
 }
 

compiler/rustc_typeck/src/check_unused.rs

@@ -155,7 +155,7 @@ fn unused_crates_lint(tcx: TyCtxt<'_>) {
         }
 
         // If the extern crate isn't in the extern prelude,
-        // there is no way it can be written as an `use`.
+        // there is no way it can be written as a `use`.
         let orig_name = extern_crate.orig_name.unwrap_or(item.ident.name);
         if !extern_prelude.get(&orig_name).map_or(false, |from_item| !from_item) {
             continue;

library/alloc/src/collections/binary_heap.rs

@@ -46,7 +46,7 @@
 //!     }
 //! }
 //!
-//! // Each node is represented as an `usize`, for a shorter implementation.
+//! // Each node is represented as a `usize`, for a shorter implementation.
 //! struct Edge {
 //!     node: usize,
 //!     cost: usize,

library/core/src/intrinsics.rs

@@ -1013,7 +1013,7 @@ extern "rust-intrinsic" {
     /// let val_casts = unsafe { &mut *(ptr as *mut i32 as *mut u32) };
     /// ```
     ///
-    /// Turning an `&str` into an `&[u8]`:
+    /// Turning an `&str` into a `&[u8]`:
     ///
     /// ```
     /// // this is not a good way to do this.

library/core/src/mem/mod.rs

@@ -660,7 +660,7 @@ pub unsafe fn zeroed<T>() -> T {
 #[rustc_diagnostic_item = "mem_uninitialized"]
 #[track_caller]
 pub unsafe fn uninitialized<T>() -> T {
-    // SAFETY: the caller must guarantee that an unitialized value is valid for `T`.
+    // SAFETY: the caller must guarantee that an uninitialized value is valid for `T`.
     unsafe {
         intrinsics::assert_uninit_valid::<T>();
         MaybeUninit::uninit().assume_init()

library/core/src/ptr/mod.rs

@@ -767,7 +767,7 @@ pub const unsafe fn read<T>(src: *const T) -> T {
 ///
 /// # Examples
 ///
-/// Read an usize value from a byte buffer:
+/// Read a usize value from a byte buffer:
 ///
 /// ```
 /// use std::mem;
@@ -960,7 +960,7 @@ pub const unsafe fn write<T>(dst: *mut T, src: T) {
 ///
 /// # Examples
 ///
-/// Write an usize value to a byte buffer:
+/// Write a usize value to a byte buffer:
 ///
 /// ```
 /// use std::mem;
@@ -1232,7 +1232,7 @@ pub(crate) unsafe fn align_offset<T: Sized>(p: *const T, a: usize) -> usize {
     let smoda = stride & a_minus_one;
     // SAFETY: a is power-of-two hence non-zero. stride == 0 case is handled above.
     let gcdpow = unsafe { intrinsics::cttz_nonzero(stride).min(intrinsics::cttz_nonzero(a)) };
-    // SAFETY: gcdpow has an upper-bound that’s at most the number of bits in an usize.
+    // SAFETY: gcdpow has an upper-bound that’s at most the number of bits in a usize.
     let gcd = unsafe { unchecked_shl(1usize, gcdpow) };
 
     // SAFETY: gcd is always greater or equal to 1.

library/std/src/ffi/mod.rs

@@ -94,7 +94,7 @@
 //!
 //! * [`OsStr`] represents a borrowed reference to a string in a
 //! format that can be passed to the operating system. It can be
-//! converted into an UTF-8 Rust string slice in a similar way to
+//! converted into a UTF-8 Rust string slice in a similar way to
 //! [`OsString`].
 //!
 //! # Conversions

library/std/src/io/mod.rs

@@ -1150,7 +1150,7 @@ impl<'a> DerefMut for IoSliceMut<'a> {
 
 /// A buffer type used with `Write::write_vectored`.
 ///
-/// It is semantically a wrapper around an `&[u8]`, but is guaranteed to be
+/// It is semantically a wrapper around a `&[u8]`, but is guaranteed to be
 /// ABI compatible with the `iovec` type on Unix platforms and `WSABUF` on
 /// Windows.
 #[stable(feature = "iovec", since = "1.36.0")]

library/std/src/keyword_docs.rs

@@ -2289,7 +2289,7 @@ mod dyn_keyword {}
 /// }
 ///
 /// let mut u = IntOrFloat { f: 1.0 };
-/// // Reading the fields of an union is always unsafe
+/// // Reading the fields of a union is always unsafe
 /// assert_eq!(unsafe { u.i }, 1065353216);
 /// // Updating through any of the field will modify all of them
 /// u.i = 1073741824;

library/std/src/sys/windows/stdio.rs

@@ -162,7 +162,7 @@ impl io::Read for Stdin {
         }
 
         let mut utf16_buf = [0u16; MAX_BUFFER_SIZE / 2];
-        // In the worst case, an UTF-8 string can take 3 bytes for every `u16` of an UTF-16. So
+        // In the worst case, a UTF-8 string can take 3 bytes for every `u16` of a UTF-16. So
         // we can read at most a third of `buf.len()` chars and uphold the guarantee no data gets
         // lost.
         let amount = cmp::min(buf.len() / 3, utf16_buf.len());

library/std/src/sys_common/wtf8.rs

@@ -785,7 +785,7 @@ pub fn is_code_point_boundary(slice: &Wtf8, index: usize) -> bool {
 /// Copied from core::str::raw::slice_unchecked
 #[inline]
 pub unsafe fn slice_unchecked(s: &Wtf8, begin: usize, end: usize) -> &Wtf8 {
-    // memory layout of an &[u8] and &Wtf8 are the same
+    // memory layout of a &[u8] and &Wtf8 are the same
     Wtf8::from_bytes_unchecked(slice::from_raw_parts(s.bytes.as_ptr().add(begin), end - begin))
 }
 

library/std/src/time/monotonic.rs

@@ -84,7 +84,7 @@ pub mod inner {
     pub(super) fn monotonize(raw: time::Instant) -> time::Instant {
         let delta = raw.checked_sub_instant(&ZERO).unwrap();
         // Split into seconds and nanos since Duration doesn't have a
-        // constructor that takes an u128
+        // constructor that takes a u128
         let secs = delta.as_secs() as u128;
         let nanos = delta.subsec_nanos() as u128;
         let timestamp: u128 = secs << 64 | nanos;

src/test/mir-opt/dest-prop/copy_propagation_arg.rs

@@ -7,7 +7,7 @@ fn dummy(x: u8) -> u8 {
 
 // EMIT_MIR copy_propagation_arg.foo.DestinationPropagation.diff
 fn foo(mut x: u8) {
-    // calling `dummy` to make an use of `x` that copyprop cannot eliminate
+    // calling `dummy` to make a use of `x` that copyprop cannot eliminate
     x = dummy(x); // this will assign a local to `x`
 }
 

src/test/ui-fulldeps/internal-lints/pass_ty_by_ref_self.rs

@@ -1,6 +1,6 @@
 // compile-flags: -Z unstable-options
 // NOTE: This test doesn't actually require `fulldeps`
-// so we could instead use it as an `ui` test.
+// so we could instead use it as a `ui` test.
 //
 // Considering that all other `internal-lints` are tested here
 // this seems like the cleaner solution though.

src/tools/clippy/clippy_lints/src/ptr_eq.rs

@@ -74,7 +74,7 @@ impl LateLintPass<'_> for PtrEq {
     }
 }
 
-// If the given expression is a cast to an usize, return the lhs of the cast
+// If the given expression is a cast to a usize, return the lhs of the cast
 // E.g., `foo as *const _ as usize` returns `foo as *const _`.
 fn expr_as_cast_to_usize<'tcx>(cx: &LateContext<'tcx>, cast_expr: &'tcx Expr<'_>) -> Option<&'tcx Expr<'tcx>> {
     if cx.typeck_results().expr_ty(cast_expr) == cx.tcx.types.usize {

src/tools/rustfmt/src/macros.rs

@@ -401,7 +401,7 @@ fn rewrite_macro_inner(
                 handle_vec_semi(context, shape, arg_vec, macro_name, style)
             } else {
                 // If we are rewriting `vec!` macro or other special macros,
-                // then we can rewrite this as an usual array literal.
+                // then we can rewrite this as a usual array literal.
                 // Otherwise, we must preserve the original existence of trailing comma.
                 let macro_name = &macro_name.as_str();
                 let mut force_trailing_comma = if trailing_comma {

src/tools/rustfmt/src/string.rs

@@ -153,7 +153,7 @@ pub(crate) fn rewrite_string<'a>(
     wrap_str(result, fmt.config.max_width(), fmt.shape)
 }
 
-/// Returns the index to the end of the URL if the split at index of the given string includes an
+/// Returns the index to the end of the URL if the split at index of the given string includes a
 /// URL or alike. Otherwise, returns `None`.
 fn detect_url(s: &[&str], index: usize) -> Option<usize> {
     let start = match s[..=index].iter().rposition(|g| is_whitespace(g)) {

src/tools/rustfmt/tests/source/cfg_if/detect/arch/x86.rs

@@ -2,7 +2,7 @@
 //!
 //! The features are detected using the `detect_features` function below.
 //! This function uses the CPUID instruction to read the feature flags from the
-//! CPU and encodes them in an `usize` where each bit position represents
+//! CPU and encodes them in a `usize` where each bit position represents
 //! whether a feature is available (bit is set) or unavaiable (bit is cleared).
 //!
 //! The enum `Feature` is used to map bit positions to feature names, and the

src/tools/rustfmt/tests/target/cfg_if/detect/arch/x86.rs

@@ -2,7 +2,7 @@
 //!
 //! The features are detected using the `detect_features` function below.
 //! This function uses the CPUID instruction to read the feature flags from the
-//! CPU and encodes them in an `usize` where each bit position represents
+//! CPU and encodes them in a `usize` where each bit position represents
 //! whether a feature is available (bit is set) or unavaiable (bit is cleared).
 //!
 //! The enum `Feature` is used to map bit positions to feature names, and the

src/tools/tidy/src/style.rs

@@ -66,7 +66,7 @@ enum LIUState {
     EXP_END,
 }
 
-/// Returns `true` if `line` appears to be a line comment containing an URL,
+/// Returns `true` if `line` appears to be a line comment containing a URL,
 /// possibly with a Markdown link label in front, and nothing else.
 /// The Markdown link label, if present, may not contain whitespace.
 /// Lines of this form are allowed to be overlength, because Markdown