Run gofmt -w -s on codebase (#2773)

This formats and simplifies all code by running gofmt -w -s on all Go
files.

Signed-off-by: Miek Gieben <miek@miek.nl>

coremain/run.go

@@ -255,13 +255,13 @@ var (
 
 // flagsBlacklist removes flags with these names from our flagset.
 var flagsBlacklist = map[string]struct{}{
-	"logtostderr":      struct{}{},
-	"alsologtostderr":  struct{}{},
-	"v":                struct{}{},
-	"stderrthreshold":  struct{}{},
-	"vmodule":          struct{}{},
-	"log_backtrace_at": struct{}{},
-	"log_dir":          struct{}{},
+	"logtostderr":      {},
+	"alsologtostderr":  {},
+	"v":                {},
+	"stderrthreshold":  {},
+	"vmodule":          {},
+	"log_backtrace_at": {},
+	"log_dir":          {},
 }
 
 var flagsToKeep []*flag.Flag