fix format for printed header

Author: WANGJIEKE

lib/PrintAsClang/DeclAndTypePrinter.cpp

@@ -437,6 +437,7 @@ class DeclAndTypePrinter::Implementation
           syntaxPrinter.printIdentifier(pair.first->getNameStr());
           os << ";\n";
         }
+        // TODO: change to Swift's fatalError when it's available in C++
         os << "    abort();\n";
       } else { // non-resilient enum
         os << "    switch (_getEnumTag()) {\n";
@@ -458,7 +459,7 @@ class DeclAndTypePrinter::Implementation
         llvm::interleave(
             elementTagMapping, os,
             [&](const auto &pair) {
-              os << "\n      tag !=" << cxx_synthesis::getCxxImplNamespaceName()
+              os << "\n      tag != " << cxx_synthesis::getCxxImplNamespaceName()
                  << "::" << pair.second.globalVariableName;
             },
             " &&");

test/Interop/SwiftToCxx/enums/resilient-enum-in-cxx.swift

@@ -45,8 +45,8 @@ public func makeFoo(_ x: Int) -> Foo {
 // CHECK-NEXT: inline bool inResilientUnknownCase() const {
 // CHECK-NEXT:   auto tag = _getEnumTag();
 // CHECK-NEXT:   return
-// CHECK-NEXT:     tag !=_impl::$s5Enums3FooO1byACSicACmFWC &&
-// CHECK-NEXT:     tag !=_impl::$s5Enums3FooO1dyACSdcACmFWC &&
-// CHECK-NEXT:     tag !=_impl::$s5Enums3FooO1ayA2CmFWC &&
-// CHECK-NEXT:     tag !=_impl::$s5Enums3FooO1cyA2CmFWC;
+// CHECK-NEXT:     tag != _impl::$s5Enums3FooO1byACSicACmFWC &&
+// CHECK-NEXT:     tag != _impl::$s5Enums3FooO1dyACSdcACmFWC &&
+// CHECK-NEXT:     tag != _impl::$s5Enums3FooO1ayA2CmFWC &&
+// CHECK-NEXT:     tag != _impl::$s5Enums3FooO1cyA2CmFWC;
 // CHECK-NEXT: }