Removed tabs everywhere except autogenerated & external files. Add make
target for tabs checking.

llvm-svn: 36146
diff --git a/llvm/lib/Transforms/Utils/LowerAllocations.cpp b/llvm/lib/Transforms/Utils/LowerAllocations.cpp
index 8acaeed..cb2f885 100644
--- a/llvm/lib/Transforms/Utils/LowerAllocations.cpp
+++ b/llvm/lib/Transforms/Utils/LowerAllocations.cpp
@@ -43,7 +43,7 @@
       AU.addRequired<TargetData>();
       AU.setPreservesCFG();
 
-      // This is a cluster of orthogonal Transforms:	
+      // This is a cluster of orthogonal Transforms:
       AU.addPreserved<UnifyFunctionExitNodes>();
       AU.addPreservedID(PromoteMemoryToRegisterID);
       AU.addPreservedID(LowerSelectID);