Apply gofmt to fix CircleCI jobs

_examples/custom-formatter/custom.go

@@ -21,7 +21,7 @@ type customFmt struct {
 }
 
 func (f *customFmt) TestRunStarted()                                                   {}
-func (f *customFmt) Feature(*messages.GherkinDocument, string, []byte) {}
+func (f *customFmt) Feature(*messages.GherkinDocument, string, []byte)                 {}
 func (f *customFmt) Pickle(*godog.Scenario)                                            {}
 func (f *customFmt) Defined(*godog.Scenario, *godog.Step, *godog.StepDefinition)       {}
 func (f *customFmt) Passed(*godog.Scenario, *godog.Step, *godog.StepDefinition)        {}