Use the range variant of find_if instead of unpacking begin/end

No functionality change is intended.

llvm-svn: 278443
diff --git a/llvm/lib/Support/SourceMgr.cpp b/llvm/lib/Support/SourceMgr.cpp
index 6d44a4d..395c29b 100644
--- a/llvm/lib/Support/SourceMgr.cpp
+++ b/llvm/lib/Support/SourceMgr.cpp
@@ -14,6 +14,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/Support/SourceMgr.h"
+#include "llvm/ADT/STLExtras.h"
 #include "llvm/ADT/Twine.h"
 #include "llvm/Support/Locale.h"
 #include "llvm/Support/MemoryBuffer.h"
@@ -395,8 +396,7 @@
   // map like Clang's TextDiagnostic. For now, we'll just handle tabs by
   // expanding them later, and bail out rather than show incorrect ranges and
   // misaligned fixits for any other odd characters.
-  if (std::find_if(LineContents.begin(), LineContents.end(), isNonASCII) !=
-      LineContents.end()) {
+  if (find_if(LineContents, isNonASCII) != LineContents.end()) {
     printSourceLine(S, LineContents);
     return;
   }