delete all duplicate empty blanks

Signed-off-by: Xiang Dai <764524258@qq.com>

Kubernetes-commit: 36065c6dd717c14e0a90131041e20345a7e5e324

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,2 +1,2 @@
-Sorry, we do not accept changes directly against this repository. Please see 
+Sorry, we do not accept changes directly against this repository. Please see
 CONTRIBUTING.md for information on where and how to contribute instead.

README.md

@@ -5,7 +5,7 @@ Generic library for building a Kubernetes aggregated API server.
 
 ## Purpose
 
-This library contains code to create Kubernetes aggregation server complete with delegated authentication and authorization, 
+This library contains code to create Kubernetes aggregation server complete with delegated authentication and authorization,
 `kubectl` compatible discovery information, optional admission chain, and versioned types.  It's first consumers are
 `k8s.io/kubernetes`, `k8s.io/kube-aggregator`, and `github.com/kubernetes-incubator/service-catalog`.
 

pkg/authentication/request/x509/testdata/generate.sh

@@ -21,4 +21,4 @@ cfssl sign -ca root.pem -ca-key root-key.pem -config intermediate.config.json in
 
 cfssl gencert -ca intermediate.pem -ca-key intermediate-key.pem -config client.config.json --profile=valid   client.csr.json | cfssljson -bare client-valid
 cfssl gencert -ca intermediate.pem -ca-key intermediate-key.pem -config client.config.json --profile=expired client.csr.json | cfssljson -bare client-expired
- 
+

plugin/pkg/authorizer/webhook/gencerts.sh

@@ -17,7 +17,7 @@
 set -e
 
 # gencerts.sh generates the certificates for the webhook authz plugin tests.
-# 
+#
 # It is not expected to be run often (there is no go generate rule), and mainly
 # exists for documentation purposes.