Fix travis-ci duration parsing

The example from the docs was very clearly with spaces after hours and minutes:
```
  "committed_at": "2011-11-11T11: 11: 11Z",
```
But in fact those spaces do not exist in the wild. Great.

src/github.com/matrix-org/go-neb/services/travisci/travisci_test.go

@@ -84,6 +84,11 @@ var travisTests = []struct {
 		"%{repository}#%{build_number} (%{branch} - %{commit} : %{author}): %{message}",
 		"Kegsay/flow-jsdoc#18 (master - 3a092c3a6032ebb50384c99b445f947e9ce86e2a : Kegan Dougal): Passed",
 	},
+	{
+		exampleSignature, true, exampleBody,
+		"%{repository}#%{build_number} %{duration}",
+		"Kegsay/flow-jsdoc#18 32s",
+	},
 }
 
 type MockTransport struct {