chore: remove duplicate words

library/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.

library/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

library/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