Index: COFF/Driver.cpp
===================================================================
--- COFF/Driver.cpp
+++ COFF/Driver.cpp
@@ -509,7 +509,7 @@
 
 // Create response file contents and invoke the MSVC linker.
 void LinkerDriver::invokeMSVC(opt::InputArgList &Args) {
-  std::string Rsp = "/nologo ";
+  std::string Rsp = "/nologo\n";
   std::vector<std::string> Temps;
 
   for (auto *Arg : Args) {
@@ -528,14 +528,14 @@
     case OPT_INPUT: {
       if (Optional<StringRef> Path = doFindFile(Arg->getValue())) {
         if (Optional<std::string> S = filterBitcodeFiles(*Path, Temps))
-          Rsp += quote(*S) + " ";
+          Rsp += quote(*S) + "\n";
         continue;
       }
-      Rsp += quote(Arg->getValue()) + " ";
+      Rsp += quote(Arg->getValue()) + "\n";
       break;
     }
     default:
-      Rsp += toString(Arg) + " ";
+      Rsp += toString(Arg) + "\n";
     }
   }
 
Index: COFF/DriverUtils.cpp
===================================================================
--- COFF/DriverUtils.cpp
+++ COFF/DriverUtils.cpp
@@ -634,7 +634,7 @@
   std::vector<TemporaryFile> Temps;
   for (StringRef S : Objects) {
     Temps.emplace_back("lto", "obj", S);
-    Rsp += quote(Temps.back().Path) + " ";
+    Rsp += quote(Temps.back().Path) + "\n";
   }
 
   log("link.exe " + Rsp);