Fix spelling. Thanks, Duncan! :-)

llvm-svn: 48873
diff --git a/llvm/lib/CodeGen/SelectionDAG/ScheduleDAGRRList.cpp b/llvm/lib/CodeGen/SelectionDAG/ScheduleDAGRRList.cpp
index caaa6a5..cef3eaf 100644
--- a/llvm/lib/CodeGen/SelectionDAG/ScheduleDAGRRList.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/ScheduleDAGRRList.cpp
@@ -1724,7 +1724,7 @@
   return Sum;
 }
 
-/// LimitedSumOfUnscheduledPredsOfSuccs - compute the sum of the unscheduled
+/// LimitedSumOfUnscheduledPredsOfSuccs - Compute the sum of the unscheduled
 /// predecessors of the successors of the SUnit SU. Stop when the provided
 /// limit is exceeded.