Spelling fixes e to i.

runtime/vm/redundancy_elimination.cc

Index: runtime/vm/redundancy_elimination.cc
diff --git a/runtime/vm/redundancy_elimination.cc b/runtime/vm/redundancy_elimination.cc
index 50a8002128587996752b8bf01714133de2b31ec6..06df06ab4b404d088efff525ccdeed9f594dd401 100644
--- a/runtime/vm/redundancy_elimination.cc
+++ b/runtime/vm/redundancy_elimination.cc
@@ -3182,7 +3182,7 @@ void AllocationSinking::ExitsCollector::CollectTransitively(Definition* alloc) {
   // Note: worklist potentially will grow while we are iterating over it.
   // We are not removing allocations from the worklist not to waste space on
   // the side maintaining BitVector of already processed allocations: worklist
-  // is expected to be very small thus linear search in it is just as effecient
+  // is expected to be very small thus linear search in it is just as efficient
   // as a bitvector.
   for (intptr_t i = 0; i < worklist_.length(); i++) {
     Collect(worklist_[i]);