From 92a173feb01b4fcff8c7c717a43be94bccfadacf Mon Sep 17 00:00:00 2001
From: Dietmar Maurer <dietmar@proxmox.com>
Date: Tue, 26 Feb 2019 07:11:24 +0100
Subject: [PATCH] src/api_schema/schema.rs: improve ParameterError display
 function

---
 src/api_schema/schema.rs | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/src/api_schema/schema.rs b/src/api_schema/schema.rs
index fbe2c839..8f1c3a9d 100644
--- a/src/api_schema/schema.rs
+++ b/src/api_schema/schema.rs
@@ -36,9 +36,16 @@ impl ParameterError {
 
 impl fmt::Display for ParameterError {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        let msg = self.error_list.iter().fold(String::from(""), |acc, item| {
+
+        let mut msg = String::new();
+
+        if self.len() > 0 {
+            msg.push_str("parameter verification errors\n\n");
+        }
+
+        msg.push_str(&self.error_list.iter().fold(String::from(""), |acc, item| {
             acc + &item.to_string() + "\n"
-        });
+        }));
 
         write!(f, "{}", msg)
     }