Fix the format in response to review comments.

Author: DanielCChen

clang/lib/Driver/Driver.cpp

@@ -733,9 +733,10 @@ static llvm::Triple computeTargetTriple(const Driver &D,
         Target.setEnvironment(llvm::Triple::GNUX32);
     } else if (A->getOption().matches(options::OPT_m32) ||
                A->getOption().matches(options::OPT_maix32)) {
-      if (D.IsFlangMode() && !Target.isOSAIX())
+      if (D.IsFlangMode() && !Target.isOSAIX()) {
         D.Diag(diag::err_drv_unsupported_opt_for_target)
             << A->getAsString(Args) << Target.str();
+      }
       else {
         AT = Target.get32BitArchVariant().getArch();
         if (Target.getEnvironment() == llvm::Triple::GNUX32)