chore: fix some typos in comments

Signed-off-by: whosehang <whosehang@outlook.com>

compiler/rustc_span/src/hygiene.rs

@@ -1251,7 +1251,7 @@ struct HygieneDecodeContextInner {
     // global `HygieneData`. When we deserialize a `SyntaxContext`, we need to create
     // a new id in the global `HygieneData`. This map tracks the ID we end up picking,
     // so that multiple occurrences of the same serialized id are decoded to the same
-    // `SyntaxContext`. This only stores `SyntaxContext`s which are completly decoded.
+    // `SyntaxContext`. This only stores `SyntaxContext`s which are completely decoded.
     remapped_ctxts: Vec<Option<SyntaxContext>>,
 
     /// Maps serialized `SyntaxContext` ids that are currently being decoded to a `SyntaxContext`.

compiler/rustc_type_ir/src/ty_kind.rs

@@ -227,7 +227,7 @@ pub enum TyKind<I: Interner> {
     /// A placeholder type, used during higher ranked subtyping to instantiate
     /// bound variables.
     ///
-    /// It is conventional to render anonymous placeholer types like `!N` or `!U_N`,
+    /// It is conventional to render anonymous placeholder types like `!N` or `!U_N`,
     /// where `N` is the placeholder variable's anonymous index (which corresponds
     /// to the bound variable's index from the binder from which it was instantiated),
     /// and `U` is the universe index in which it is instantiated, or totally omitted

library/core/src/fmt/rt.rs

@@ -153,7 +153,7 @@ impl<'a> Argument<'a> {
     ///
     /// # Safety
     ///
-    /// This argument must actually be a placeholer argument.
+    /// This argument must actually be a placeholder argument.
     ///
     // FIXME: Transmuting formatter in new and indirectly branching to/calling
     // it here is an explicit CFI violation.

src/doc/rustc/src/platform-support/arm64ec-pc-windows-msvc.md

@@ -73,7 +73,7 @@ Tests can be run on AArch64 Windows 11 devices.
 
 ## Cross-compilation toolchains and C code
 
-C code can be built using the Arm64-targetting MSVC or Clang toolchain.
+C code can be built using the Arm64-targeting MSVC or Clang toolchain.
 
 To compile:
 

src/doc/rustc/src/platform-support/wasm32-wasip1.md

@@ -59,7 +59,7 @@ languages compiled to WebAssembly, for example C/C++. Any ABI differences or
 mismatches are considered bugs that need to be fixed.
 
 By default the WASI targets in Rust ship in rustup with a precompiled copy of
-[`wasi-libc`] meaning that a WebAssembly-targetting-Clang is not required to
+[`wasi-libc`] meaning that a WebAssembly-targeting-Clang is not required to
 use the WASI targets from Rust.  If there is no actual interoperation with C
 then `rustup target add wasm32-wasip1` is all that's needed to get
 started with WASI.

src/doc/rustdoc/src/lints.md

@@ -417,7 +417,7 @@ warning: 1 warning emitted
 
 This lint is **warn-by-default**. It detects explicit links that are the same
 as computed automatic links.
-This usually means the explicit links are removeable. For example:
+This usually means the explicit links are removable. For example:
 
 ```rust
 #![warn(rustdoc::redundant_explicit_links)] // note: unnecessary - warns by default.

src/doc/rustdoc/src/write-documentation/linking-to-items-by-name.md

@@ -168,4 +168,4 @@ render differently in this case:
 ```
 
 `1.` and `2.` will be displayed as is in the rendered documentation (ie, `[a]` and `[b][c]`)
-whereas `3.` and `4.` will be replaced by a link targetting `e` for `[d](e)` and `g` for `[f]`.
+whereas `3.` and `4.` will be replaced by a link targeting `e` for `[d](e)` and `g` for `[f]`.

src/librustdoc/lint.rs

@@ -187,7 +187,7 @@ declare_rustdoc_lint! {
 
 declare_rustdoc_lint! {
     /// This lint is **warn-by-default**. It detects explicit links that are the same
-    /// as computed automatic links. This usually means the explicit links are removeable.
+    /// as computed automatic links. This usually means the explicit links are removable.
     /// This is a `rustdoc` only lint, see the documentation in the [rustdoc book].
     ///
     /// [rustdoc book]: ../../../rustdoc/lints.html#redundant_explicit_links

src/rustdoc-json-types/lib.rs

@@ -314,7 +314,7 @@ pub enum StructKind {
     /// All [`Id`]'s will point to [`ItemEnum::StructField`]. Private and
     /// `#[doc(hidden)]` fields will be given as `None`
     Tuple(Vec<Option<Id>>),
-    /// A struct with nammed fields.
+    /// A struct with named fields.
     ///
     /// ```rust
     /// pub struct PlainStruct { x: i32 }