edited base64 decode command (#15691)

* edited base64 decode command

Edited sincle it's failing with message-
base64: invalid argument -

* make gen changes

content/en/docs/tasks/security/authorization/authz-jwt/index.md

@@ -112,7 +112,7 @@ Caching and propagation can cause a delay.
    This causes Istio to generate the attribute `requestPrincipal` with the value `[email protected]/[email protected]`:
 
     {{< text syntax="bash" expandlinks="false" >}}
-    $ TOKEN=$(curl {{< github_file >}}/security/tools/jwt/samples/demo.jwt -s) && echo "$TOKEN" | cut -d '.' -f2 - | base64 --decode -
+    $ TOKEN=$(curl {{< github_file >}}/security/tools/jwt/samples/demo.jwt -s) && echo "$TOKEN" | cut -d '.' -f2 - | base64 --decode
     {"exp":4685989700,"foo":"bar","iat":1532389700,"iss":"[email protected]","sub":"[email protected]"}
     {{< /text >}}
 
@@ -162,7 +162,7 @@ Caching and propagation can cause a delay.
 1. Get the JWT that sets the `groups` claim to a list of strings: `group1` and `group2`:
 
     {{< text syntax="bash" expandlinks="false" >}}
-    $ TOKEN_GROUP=$(curl {{< github_file >}}/security/tools/jwt/samples/groups-scope.jwt -s) && echo "$TOKEN_GROUP" | cut -d '.' -f2 - | base64 --decode -
+    $ TOKEN_GROUP=$(curl {{< github_file >}}/security/tools/jwt/samples/groups-scope.jwt -s) && echo "$TOKEN_GROUP" | cut -d '.' -f2 - | base64 --decode
     {"exp":3537391104,"groups":["group1","group2"],"iat":1537391104,"iss":"[email protected]","scope":["scope1","scope2"],"sub":"[email protected]"}
     {{< /text >}}
 

content/en/docs/tasks/security/authorization/authz-jwt/snips.sh

@@ -87,7 +87,7 @@ EOF
 }
 
 snip_allow_requests_with_valid_jwt_and_listtyped_claims_5() {
-TOKEN=$(curl https://raw.githubusercontent.com/istio/istio/master/security/tools/jwt/samples/demo.jwt -s) && echo "$TOKEN" | cut -d '.' -f2 - | base64 --decode -
+TOKEN=$(curl https://raw.githubusercontent.com/istio/istio/master/security/tools/jwt/samples/demo.jwt -s) && echo "$TOKEN" | cut -d '.' -f2 - | base64 --decode
 }
 
 ! IFS=$'\n' read -r -d '' snip_allow_requests_with_valid_jwt_and_listtyped_claims_5_out <<\ENDSNIP
@@ -133,7 +133,7 @@ EOF
 }
 
 snip_allow_requests_with_valid_jwt_and_listtyped_claims_9() {
-TOKEN_GROUP=$(curl https://raw.githubusercontent.com/istio/istio/master/security/tools/jwt/samples/groups-scope.jwt -s) && echo "$TOKEN_GROUP" | cut -d '.' -f2 - | base64 --decode -
+TOKEN_GROUP=$(curl https://raw.githubusercontent.com/istio/istio/master/security/tools/jwt/samples/groups-scope.jwt -s) && echo "$TOKEN_GROUP" | cut -d '.' -f2 - | base64 --decode
 }
 
 ! IFS=$'\n' read -r -d '' snip_allow_requests_with_valid_jwt_and_listtyped_claims_9_out <<\ENDSNIP