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

Author: steffahn

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,

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.

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()

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.

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

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")]

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;

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());

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))
 }
 

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;