Rollup merge of #66798 - bwignall:typo, r=varkor

Fix spelling typos

Should be non-semantic.

Uses https://en.wikipedia.org/wiki/Wikipedia:Lists_of_common_misspellings/For_machines to find likely typos.

src/libcore/hint.rs

@@ -113,7 +113,7 @@ pub fn spin_loop() {
 pub fn black_box<T>(dummy: T) -> T {
     // We need to "use" the argument in some way LLVM can't introspect, and on
     // targets that support it we can typically leverage inline assembly to do
-    // this. LLVM's intepretation of inline assembly is that it's, well, a black
+    // this. LLVM's interpretation of inline assembly is that it's, well, a black
     // box. This isn't the greatest implementation since it probably deoptimizes
     // more than we want, but it's so far good enough.
     unsafe {

src/libcore/intrinsics.rs

@@ -1279,7 +1279,7 @@ extern "rust-intrinsic" {
     /// undefined behavior when `x + y > T::max_value()` or `x + y < T::min_value()`.
     pub fn unchecked_add<T>(x: T, y: T) -> T;
 
-    /// Returns the result of an unchecked substraction, resulting in
+    /// Returns the result of an unchecked subtraction, resulting in
     /// undefined behavior when `x - y > T::max_value()` or `x - y < T::min_value()`.
     pub fn unchecked_sub<T>(x: T, y: T) -> T;