BitcodeReader: Fix weird whitespace, NFC

llvm-svn: 264822
diff --git a/llvm/lib/Bitcode/Reader/BitcodeReader.cpp b/llvm/lib/Bitcode/Reader/BitcodeReader.cpp
index c6abcad..93496fe 100644
--- a/llvm/lib/Bitcode/Reader/BitcodeReader.cpp
+++ b/llvm/lib/Bitcode/Reader/BitcodeReader.cpp
@@ -78,7 +78,7 @@
   }
 
   Value *back() const { return ValuePtrs.back(); }
-    void pop_back() { ValuePtrs.pop_back(); }
+  void pop_back() { ValuePtrs.pop_back(); }
   bool empty() const { return ValuePtrs.empty(); }
   void shrinkTo(unsigned N) {
     assert(N <= size() && "Invalid shrinkTo request!");