Spellchecking some comments

This PR attempts to clean up some minor spelling mistakes in comments

compiler/rustc_const_eval/src/interpret/intern.rs

@@ -73,7 +73,7 @@ struct IsStaticOrFn;
 
 /// Intern an allocation without looking at its children.
 /// `mode` is the mode of the environment where we found this pointer.
-/// `mutablity` is the mutability of the place to be interned; even if that says
+/// `mutability` is the mutability of the place to be interned; even if that says
 /// `immutable` things might become mutable if `ty` is not frozen.
 /// `ty` can be `None` if there is no potential interior mutability
 /// to account for (e.g. for vtables).

compiler/rustc_const_eval/src/interpret/memory.rs

@@ -1011,7 +1011,7 @@ impl<'mir, 'tcx, M: Machine<'mir, 'tcx>> Memory<'mir, 'tcx, M> {
         let src_parts = self.get_ptr_access(src, size, src_align)?;
         let dest_parts = self.get_ptr_access(dest, size * num_copies, dest_align)?; // `Size` multiplication
 
-        // FIXME: we look up both allocations twice here, once ebfore for the `check_ptr_access`
+        // FIXME: we look up both allocations twice here, once before for the `check_ptr_access`
         // and once below to get the underlying `&[mut] Allocation`.
 
         // Source alloc preparations and access hooks.

compiler/rustc_const_eval/src/interpret/place.rs

@@ -876,7 +876,7 @@ where
         if src.layout.size != dest.layout.size {
             // FIXME: This should be an assert instead of an error, but if we transmute within an
             // array length computation, `typeck` may not have yet been run and errored out. In fact
-            // most likey we *are* running `typeck` right now. Investigate whether we can bail out
+            // most likely we *are* running `typeck` right now. Investigate whether we can bail out
             // on `typeck_results().has_errors` at all const eval entry points.
             debug!("Size mismatch when transmuting!\nsrc: {:#?}\ndest: {:#?}", src, dest);
             self.tcx.sess.delay_span_bug(

compiler/rustc_const_eval/src/interpret/step.rs

@@ -39,7 +39,7 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
     ///
     /// This is used by [priroda](https://github.com/oli-obk/priroda)
     ///
-    /// This is marked `#inline(always)` to work around adverserial codegen when `opt-level = 3`
+    /// This is marked `#inline(always)` to work around adversarial codegen when `opt-level = 3`
     #[inline(always)]
     pub fn step(&mut self) -> InterpResult<'tcx, bool> {
         if self.stack().is_empty() {

compiler/rustc_const_eval/src/interpret/terminator.rs

@@ -329,7 +329,7 @@ impl<'mir, 'tcx: 'mir, M: Machine<'mir, 'tcx>> InterpCx<'mir, 'tcx, M> {
 
                 // Compute callee information using the `instance` returned by
                 // `find_mir_or_eval_fn`.
-                // FIXME: for variadic support, do we have to somehow determine calle's extra_args?
+                // FIXME: for variadic support, do we have to somehow determine callee's extra_args?
                 let callee_fn_abi = self.fn_abi_of_instance(instance, ty::List::empty())?;
 
                 if callee_fn_abi.c_variadic != caller_fn_abi.c_variadic {