fix golint failures of pkg/capabilities

pkg/capabilities/capabilities.go

@@ -76,7 +76,7 @@ func SetForTests(c Capabilities) {
 	capInstance.capabilities = &c
 }
 
-// Returns a read-only copy of the system capabilities.
+// Get returns a read-only copy of the system capabilities.
 func Get() Capabilities {
 	capInstance.lock.Lock()
 	defer capInstance.lock.Unlock()

pkg/capabilities/doc.go

@@ -14,5 +14,5 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-// package capabilities manages system level capabilities
+// Package capabilities manages system level capabilities
 package capabilities // import "k8s.io/kubernetes/pkg/capabilities"