Merge pull request #517 from CJ-Johnson/remake_branch

Update TotW #120 to reflect the OSS availability of absl::Cleanup

Author: axgillies

_posts/2018-04-20-totw-120.md

@@ -17,9 +17,9 @@ Let's suppose you have this code snippet, which seems to be working as expected:
 ```c++
 absl::Status DoSomething() {
   absl::Status status;
-  auto log_on_error = absl::MakeCleanup([&status] {
+  absl::Cleanup log_on_error = [&status] {
     if (!status.ok()) LOG(ERROR) << status;
-  });
+  };
   status = DoA();
   if (!status.ok()) return status;
   status = DoB();
@@ -108,9 +108,9 @@ absl::Status DoSomething() {
   // The 'return status;' statements will always copy the object and Logger
   // will always see the correct value.
   absl::Status& status = status_no_nrvo;
-  auto log_on_error = absl::MakeCleanup([&status] {
+  absl::Cleanup log_on_error = [&status] {
     if (!status.ok()) LOG(ERROR) << status;
-  });
+  };
   status = DoA();
   if (!status.ok()) return status;
   status = DoB();