remove Emacs-tag form .cpp files in Mips Backend, and fix some typo.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150805 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/Mips/MipsISelDAGToDAG.cpp b/lib/Target/Mips/MipsISelDAGToDAG.cpp
index a608b56..73533eb 100644
--- a/lib/Target/Mips/MipsISelDAGToDAG.cpp
+++ b/lib/Target/Mips/MipsISelDAGToDAG.cpp
@@ -1,4 +1,4 @@
-//=== MipsISelDAGToDAG.cpp - A Dag to Dag Inst Selector for Mips -*- C++ -*-==//
+//===-- MipsISelDAGToDAG.cpp - A Dag to Dag Inst Selector for Mips --------===//
 //
 //                     The LLVM Compiler Infrastructure
 //