correct typos

Author: nikomatsakis

src/librustc_trans/trans/mir/mod.rs

@@ -159,7 +159,7 @@ fn arg_value_refs<'bcx, 'tcx>(bcx: Block<'bcx, 'tcx>,
                llarg
            } else if common::type_is_fat_ptr(tcx, arg_ty) {
                // we pass fat pointers as two words, but we want to
-               // represent them internally as a pointer two two words,
+               // represent them internally as a pointer to two words,
                // so make an alloca to store them in.
                let lldata = llvm::get_param(fcx.llfn, idx);
                let llextra = llvm::get_param(fcx.llfn, idx + 1);

src/librustc_trans/trans/mir/rvalue.rs

@@ -172,7 +172,7 @@ impl<'bcx, 'tcx> MirContext<'bcx, 'tcx> {
                         //
                         // Note that this is currently duplicated with src/libcore/ops.rs
                         // which does the same thing, and it would be nice to perhaps unify
-                        // these two implementations on day! Also note that we call `fmod`
+                        // these two implementations one day! Also note that we call `fmod`
                         // for both 32 and 64-bit floats because if we emit any FRem
                         // instruction at all then LLVM is capable of optimizing it into a
                         // 32-bit FRem (which we're trying to avoid).