diff --git a/core/src/clone.rs b/core/src/clone.rs
index d7ce65f6c53a9..939b2be6dfaf1 100644
--- a/core/src/clone.rs
+++ b/core/src/clone.rs
@@ -230,7 +230,7 @@ pub struct AssertParamIsCopy<T: Copy + ?Sized> {
 pub unsafe trait CloneToUninit {
     /// Performs copy-assignment from `self` to `dst`.
     ///
-    /// This is analogous to to `std::ptr::write(dst, self.clone())`,
+    /// This is analogous to `std::ptr::write(dst, self.clone())`,
     /// except that `self` may be a dynamically-sized type ([`!Sized`](Sized)).
     ///
     /// Before this function is called, `dst` may point to uninitialized memory.
diff --git a/core/src/iter/adapters/mod.rs b/core/src/iter/adapters/mod.rs
index 05a5f2689056b..1bde4488cc9de 100644
--- a/core/src/iter/adapters/mod.rs
+++ b/core/src/iter/adapters/mod.rs
@@ -159,7 +159,7 @@ pub(crate) struct GenericShunt<'a, I, R> {
     residual: &'a mut Option<R>,
 }
 
-/// Process the given iterator as if it yielded a the item's `Try::Output`
+/// Process the given iterator as if it yielded the item's `Try::Output`
 /// type instead. Any `Try::Residual`s encountered will stop the inner iterator
 /// and be propagated back to the overall result.
 pub(crate) fn try_process<I, T, R, F, U>(iter: I, mut f: F) -> ChangeOutputType<I::Item, U>
diff --git a/core/src/num/dec2flt/lemire.rs b/core/src/num/dec2flt/lemire.rs
index 3bc052df7a6c1..01642e1b1112a 100644
--- a/core/src/num/dec2flt/lemire.rs
+++ b/core/src/num/dec2flt/lemire.rs
@@ -157,7 +157,7 @@ fn compute_product_approx(q: i64, w: u64, precision: usize) -> (u64, u64) {
         // Need to do a second multiplication to get better precision
         // for the lower product. This will always be exact
         // where q is < 55, since 5^55 < 2^128. If this wraps,
-        // then we need to need to round up the hi product.
+        // then we need to round up the hi product.
         let (_, second_hi) = full_multiplication(w, hi5);
         first_lo = first_lo.wrapping_add(second_hi);
         if second_hi > first_lo {
diff --git a/std/src/io/error/repr_bitpacked.rs b/std/src/io/error/repr_bitpacked.rs
index c9d3934ad70ce..a5cefe2292be4 100644
--- a/std/src/io/error/repr_bitpacked.rs
+++ b/std/src/io/error/repr_bitpacked.rs
@@ -28,7 +28,7 @@
 //!
 //! # Layout
 //! Tagged values are 64 bits, with the 2 least significant bits used for the
-//! tag. This means there are there are 4 "variants":
+//! tag. This means there are 4 "variants":
 //!
 //! - **Tag 0b00**: The first variant is equivalent to
 //!   `ErrorData::SimpleMessage`, and holds a `&'static SimpleMessage` directly.
diff --git a/std/src/sys/pal/unix/args.rs b/std/src/sys/pal/unix/args.rs
index db2ec73148e38..e2ec838b740cb 100644
--- a/std/src/sys/pal/unix/args.rs
+++ b/std/src/sys/pal/unix/args.rs
@@ -183,7 +183,7 @@ mod imp {
 // Use `_NSGetArgc` and `_NSGetArgv` on Apple platforms.
 //
 // Even though these have underscores in their names, they've been available
-// since since the first versions of both macOS and iOS, and are declared in
+// since the first versions of both macOS and iOS, and are declared in
 // the header `crt_externs.h`.
 //
 // NOTE: This header was added to the iOS 13.0 SDK, which has been the source
diff --git a/std/src/sys/pal/windows/alloc.rs b/std/src/sys/pal/windows/alloc.rs
index 681d1a5efe932..24c237b5eb03d 100644
--- a/std/src/sys/pal/windows/alloc.rs
+++ b/std/src/sys/pal/windows/alloc.rs
@@ -190,7 +190,7 @@ unsafe fn allocate(layout: Layout, zeroed: bool) -> *mut u8 {
         // it, it is safe to write a header directly before it.
         unsafe { ptr::write((aligned as *mut Header).sub(1), Header(ptr)) };
 
-        // SAFETY: The returned pointer does not point to the to the start of an allocated block,
+        // SAFETY: The returned pointer does not point to the start of an allocated block,
         // but there is a header readable directly before it containing the location of the start
         // of the block.
         aligned