fix typos

src/librustc/mir/interpret/allocation.rs

@@ -306,7 +306,7 @@ impl<'tcx, Tag: Copy, Extra: AllocationExtra<Tag>> Allocation<Tag, Extra> {
     ///
     /// zsts can't be read out of two reasons:
     /// * byteorder cannot work with zero element buffers
-    /// * in oder to obtain a `Pointer` we need to check for ZSTness anyway due to integer pointers
+    /// * in order to obtain a `Pointer` we need to check for ZSTness anyway due to integer pointers
     ///   being valid for ZSTs
     ///
     /// It is the caller's responsibility to check bounds and alignment beforehand.

src/librustc_mir/interpret/memory.rs

@@ -297,7 +297,7 @@ impl<'mir, 'tcx, M: Machine<'mir, 'tcx>> Memory<'mir, 'tcx, M> {
     /// and `align`. On success, returns `None` for zero-sized accesses (where
     /// nothing else is left to do) and a `Pointer` to use for the actual access otherwise.
     /// Crucially, if the input is a `Pointer`, we will test it for liveness
-    /// *even of* the size is 0.
+    /// *even if* the size is 0.
     ///
     /// Everyone accessing memory based on a `Scalar` should use this method to get the
     /// `Pointer` they need. And even if you already have a `Pointer`, call this method