[130-all-keys-sample] Removed spurious trailing spaces

doc/examples/kea4/comments.json

@@ -65,7 +65,7 @@
 
        // In subnets
        "subnet4": [
-         { 
+         {
            "comment": "A subnet",
            "subnet": "192.0.1.0/24",
            "id": 100,

doc/examples/kea4/ha-load-balancing-primary.json

@@ -129,7 +129,7 @@
                              // set to the corresponding values.
                              "url": "http://192.168.56.33:8080/",
                              // This server is primary. The other one must be
-                             // secondary. 
+                             // secondary.
                              "role": "primary"
                          },
                          // This is the configuration of our HA peer.

doc/examples/kea4/with-ddns.json

 // This is an example configuration file for the DHCPv4 server in Kea.
 // It is a basic scenario with one IPv4 subnet configured but with DDNS
-// enabled. 
+// enabled.
 
 { "Dhcp4":
 

doc/examples/kea6/comments.json

@@ -65,7 +65,7 @@
 
        // In subnets
        "subnet6": [
-         { 
+         {
            "comment": "A subnet",
            "subnet": "2001:db1::/64",
            "id": 100,