MC: Change MCInst::dump_pretty to not include a trailing newline.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104696 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/X86/X86AsmBackend.cpp

@@ -124,6 +124,7 @@ void X86AsmBackend::RelaxInstruction(const MCInstFragment *IF,
     SmallString<256> Tmp;
     raw_svector_ostream OS(Tmp);
     IF->getInst().dump_pretty(OS);
+    OS << "\n";
     report_fatal_error("unexpected instruction to relax: " + OS.str());
   }