Squash typos in comments

compiler/cmm/CmmUtils.hs

@@ -241,7 +241,7 @@ cmmLabelOff :: CLabel -> Int -> CmmLit
 cmmLabelOff lbl 0        = CmmLabel lbl
 cmmLabelOff lbl byte_off = CmmLabelOff lbl byte_off
 
--- | Useful for creating an index into an array, with a staticaly known offset.
+-- | Useful for creating an index into an array, with a statically known offset.
 -- The type is the element type; used for making the multiplier
 cmmIndex :: DynFlags
          -> Width       -- Width w

rts/Linker.c

@@ -1692,7 +1692,7 @@ initLinker_ (int retain_cafs)
         barf("ghciInsertSymbolTable failed");
     }
 
-    // Redurect newCAF to newRetainedCAF if retain_cafs is true.
+    // Redirect newCAF to newRetainedCAF if retain_cafs is true.
     if (! ghciInsertSymbolTable(WSTR("(GHCi built-in symbols)"), symhash,
                                 MAYBE_LEADING_UNDERSCORE_STR("newCAF"),
                                 retain_cafs ? newRetainedCAF : newGCdCAF,

rts/Trace.c

@@ -461,7 +461,7 @@ void traceOSProcessInfo_(void) {
                         getpid());
 
 #if !defined(cygwin32_HOST_OS) && !defined (mingw32_HOST_OS)
-/* Windows has no strong concept of process heirarchy, so no getppid().
+/* Windows has no strong concept of process hierarchy, so no getppid().
  * In any case, this trace event is mainly useful for tracing programs
  * that use 'forkProcess' which Windows doesn't support anyway.
  */