Kubernetes segment shorter if possible

Fixes #675

powerlevel9k.zsh-theme

@@ -1423,7 +1423,18 @@ prompt_kubecontext() {
     if [[ -z "$k8s_namespace" ]]; then
       k8s_namespace="default"
     fi
-    "$1_prompt_segment" "$0" "$2" "magenta" "white" "$k8s_context/$k8s_namespace" "KUBERNETES_ICON"
+  
+    local k8s_final_text=""
+
+    if [[ "$k8s_context" == "k8s_namespace" ]]; then
+      # No reason to print out the same identificator twice
+      k8s_final_text="k8s_context"
+    else
+      k8s_final_text="$k8s_context/$k8s_namespace"
+    fi
+  
+    
+    "$1_prompt_segment" "$0" "$2" "magenta" "white" "$k8s_final_text" "KUBERNETES_ICON"
   fi
 }