Trivial cleanups.

This just clang formats and cleans comments in an area I am about to
post a patch for review.

llvm-svn: 269946
diff --git a/llvm/lib/Target/X86/X86TargetMachine.cpp b/llvm/lib/Target/X86/X86TargetMachine.cpp
index e0f63de..cde3197 100644
--- a/llvm/lib/Target/X86/X86TargetMachine.cpp
+++ b/llvm/lib/Target/X86/X86TargetMachine.cpp
@@ -106,7 +106,7 @@
   return Ret;
 }
 
-/// X86TargetMachine ctor - Create an X86 target.
+/// Create an X86 target.
 ///
 X86TargetMachine::X86TargetMachine(const Target &T, const Triple &TT,
                                    StringRef CPU, StringRef FS,