Fix spelling.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9027 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/Utils/BasicBlockUtils.cpp b/lib/Transforms/Utils/BasicBlockUtils.cpp
index 0f0f14a..d5f7f1f 100644
--- a/lib/Transforms/Utils/BasicBlockUtils.cpp
+++ b/lib/Transforms/Utils/BasicBlockUtils.cpp
@@ -64,7 +64,7 @@
 // degree of the current basic block, the actual terminator instruction itself
 // may have to be changed.  In the case where the last successor of the block is
 // deleted, a return instruction is inserted in its place which can cause a
-// suprising change in program behavior if it is not expected.
+// surprising change in program behavior if it is not expected.
 //
 void RemoveSuccessor(TerminatorInst *TI, unsigned SuccNum) {
   assert(SuccNum < TI->getNumSuccessors() &&