Remove trailing whitespace

llvm-svn: 21420
diff --git a/llvm/lib/CodeGen/UnreachableBlockElim.cpp b/llvm/lib/CodeGen/UnreachableBlockElim.cpp
index 5feab0f..1d4e530 100644
--- a/llvm/lib/CodeGen/UnreachableBlockElim.cpp
+++ b/llvm/lib/CodeGen/UnreachableBlockElim.cpp
@@ -1,12 +1,12 @@
 //===-- UnreachableBlockElim.cpp - Remove unreachable blocks for codegen --===//
-// 
+//
 //                     The LLVM Compiler Infrastructure
 //
 // This file was developed by the LLVM research group and is distributed under
 // the University of Illinois Open Source License. See LICENSE.TXT for details.
-// 
+//
 //===----------------------------------------------------------------------===//
-// 
+//
 // This pass is an extremely simple version of the SimplifyCFG pass.  Its sole
 // job is to delete LLVM basic blocks that are not reachable from the entry
 // node.  To do this, it performs a simple depth first traversal of the CFG,