IRGen: Fix some formatting in an assertion regarding on-stack pack cleanups

Author: slavapestov

lib/IRGen/IRGenSIL.cpp

@@ -2712,20 +2712,20 @@ void IRGenSILFunction::visitSILBasicBlock(SILBasicBlock *BB) {
         llvm::errs()
             << "Instruction missing on-stack pack metadata cleanups!\n";
         I.print(llvm::errs());
-        llvm::errs() << "\n In function";
+        llvm::errs() << "\n In function:\n";
         CurSILFn->print(llvm::errs());
-        llvm::errs() << "Allocated the following on-stack pack metadata:";
+        llvm::errs() << "Allocated the following on-stack pack metadata:\n";
         for (auto pair : OutstandingStackPackAllocs) {
           StackAddress addr;
           llvm::Value *shape;
           uint8_t kind;
           std::tie(addr, shape, kind) = pair;
           switch ((GenericRequirement::Kind)kind) {
           case GenericRequirement::Kind::MetadataPack:
-            llvm::errs() << "Metadata Pack: ";
+            llvm::errs() << "- Metadata Pack: ";
             break;
           case GenericRequirement::Kind::WitnessTablePack:
-            llvm::errs() << "Witness Table Pack: ";
+            llvm::errs() << "- Witness Table Pack: ";
             break;
           default:
             llvm_unreachable("bad requirement in stack pack alloc");