diff --git a/metrics/debug.go b/metrics/debug.go
index fdc7e2eaa9..4d5169f59a 100644
--- a/metrics/debug.go
+++ b/metrics/debug.go
@@ -19,7 +19,7 @@ var (
 	gcStats debug.GCStats
 )
 
-// CaptureDebugGCStats captures new values for the Go garbage collector statistics 
+// CaptureDebugGCStats captures new values for the Go garbage collector statistics
 // exported in debug.GCStats.  This is designed to be called as a goroutine.
 func CaptureDebugGCStats(r Registry, d time.Duration) {
 	for range time.Tick(d) {
@@ -28,8 +28,8 @@ func CaptureDebugGCStats(r Registry, d time.Duration) {
 }
 
 // CaptureDebugGCStatsOnce captures new values for the Go garbage collector
-// statistics exported in debug.GCStats.  This is designed to be called in a 
-// background goroutine.Giving a registry which has not been given to 
+// statistics exported in debug.GCStats.  This is designed to be called in a
+// background goroutine.Giving a registry which has not been given to
 // RegisterDebugGCStats will
 // panic.
 //
diff --git a/metrics/runtime.go b/metrics/runtime.go
index 66a6d7a8db..70791a1104 100644
--- a/metrics/runtime.go
+++ b/metrics/runtime.go
@@ -52,7 +52,7 @@ var (
 	threadCreateProfile = pprof.Lookup("threadcreate")
 )
 
-// CaptureRuntimeMemStats captures new values for the Go runtime statistics exported 
+// CaptureRuntimeMemStats captures new values for the Go runtime statistics exported
 // in runtime.MemStats.  This is designed to be called as a goroutine.
 func CaptureRuntimeMemStats(r Registry, d time.Duration) {
 	for range time.Tick(d) {
@@ -60,7 +60,7 @@ func CaptureRuntimeMemStats(r Registry, d time.Duration) {
 	}
 }
 
-// CaptureRuntimeMemStatsOnce captures new values for the Go runtime statistics 
+// CaptureRuntimeMemStatsOnce captures new values for the Go runtime statistics
 // exported in runtime.MemStats.  This is designed to be called in a background
 // goroutine.  Giving a registry which has not been given to RegisterRuntimeMemStats
 // will panic.