Address a syntax error

src/yang/etsi-nfv-descriptors.yang

@@ -24,6 +24,7 @@ module etsi-nfv-descriptors {
   container nfv {
     list vnfd {
       key "id";
+
       description
         "A VNF Descriptor (VNFD) is a deployment template which
          describes a VNF in terms of deployment and operational

src/yang/etsi-nfv-ns.yang

@@ -418,7 +418,7 @@ submodule etsi-nfv-ns {
       list nfp-position-element {
         key "id";
 
-	min-elements 1;
+        min-elements 1;
 
         leaf id {
           type string;
@@ -443,6 +443,7 @@ submodule etsi-nfv-ns {
                 }
               }
             }
+
             container pnf-profile {
               leaf pnf-profile-id {
                 must ". = deref(../../pnfd-profile-id)" {
@@ -452,6 +453,7 @@ submodule etsi-nfv-ns {
                 }
               }
             }
+
             container ns-profile {
               leaf ns-profile-id {
                 must ". = deref(../../ns-profile-id)" {
@@ -468,41 +470,41 @@ submodule etsi-nfv-ns {
                CpdInConstituentElement information element";
           }
 
-        choice constituent-cpd-id {
-          container vnf {
-            leaf vnfd-id {
-              must ". = deref(../../vnfd-profile-id)/../vnfd-id" {
-              }
-              type leafref {
-                path "/nfv:nfv/nfv:vnfd/nfv:id";
+          choice constituent-cpd-id {
+            container vnf {
+              leaf vnfd-id {
+                must ". = deref(../../vnfd-profile-id)/../vnfd-id" {
+                }
+                type leafref {
+                  path "/nfv:nfv/nfv:vnfd/nfv:id";
+                }
               }
-            }
-            leaf cpd-id {
-              type leafref {
-                path "deref(../vnfd-id)/../nfv:ext-cpd/nfv:id";
+              leaf cpd-id {
+                type leafref {
+                  path "deref(../vnfd-id)/../nfv:ext-cpd/nfv:id";
+                }
               }
             }
+
             container pnf {
               leaf pnfd-id {
                 must ". = deref(../../pnfd-profile-id)/../pnfd-id" {
                 }
                 type leafref {
-                  path "../../../../../../pnfd/id";
+                  path "/nfv:nfv/nfv:pnfd/nfv:id";
                 }
               }
-              type leafref {
-                path "/nfv:nfv/nfv:pnfd/nfv:id";
-              }
-            }
-            leaf pnf-cpd-id {
-              type leafref {
-                path "deref(../pnfd-id)/../nfv:ext-cpd/nfv:id";
+              leaf pnf-cpd-id {
+                type leafref {
+                  path "deref(../pnfd-id)/../nfv:ext-cpd/nfv:id";
+                }
               }
             }
+
             container ns {
               leaf nsd-id {
                 must ". = deref(../../nested-ns-profile-id)/" +
-                  "../nsd-id" {
+                     "../nsd-id" {
                 }
 
                 type leafref {