Fix typo

This PR is fixes typo "avaiable" to "available".

Author: ydah

src/doc/rustc/src/platform-support/pc-windows-gnullvm.md

@@ -4,7 +4,7 @@
 
 Windows targets similar to `*-pc-windows-gnu` but using UCRT as the runtime and various LLVM tools/libraries instead of GCC/Binutils.
 
-Target triples avaiable so far:
+Target triples available so far:
 - `aarch64-pc-windows-gnullvm`
 - `x86_64-pc-windows-gnullvm`
 
@@ -26,7 +26,7 @@ Like with any other Windows target created binaries are in PE format.
 ## Building the target
 
 For cross-compilation I recommend using [llvm-mingw](https://github.com/mstorsjo/llvm-mingw) toolchain, one change that seems necessary beside configuring corss compilers is disabling experimental `m86k` target. Otherwise LLVM build fails with `multiple definition ...` errors.
-Native bootstrapping builds require rather fragile hacks until host artifacts are avaiable so I won't describe them here.
+Native bootstrapping builds require rather fragile hacks until host artifacts are available so I won't describe them here.
 
 ## Building Rust programs
 

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

@@ -3,7 +3,7 @@
 //! 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 a `usize` where each bit position represents
-//! whether a feature is available (bit is set) or unavaiable (bit is cleared).
+//! whether a feature is available (bit is set) or unavailable (bit is cleared).
 //!
 //! The enum `Feature` is used to map bit positions to feature names, and the
 //! the `__crate::detect::check_for!` macro is used to map string literals (e.g.,

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

@@ -3,7 +3,7 @@
 //! 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 a `usize` where each bit position represents
-//! whether a feature is available (bit is set) or unavaiable (bit is cleared).
+//! whether a feature is available (bit is set) or unavailable (bit is cleared).
 //!
 //! The enum `Feature` is used to map bit positions to feature names, and the
 //! the `__crate::detect::check_for!` macro is used to map string literals (e.g.,