Fix number or format arguments in OSGiProxyConfiguration

The format string requires 6 arguments while 7 are provided.
From the format string it is clear that the first argument has
been added by mistake.

Contributed by Michiel Eggermont <michiel.eggermont at gmail.com>

git-svn-id: https://svn.apache.org/repos/asf/httpcomponents/httpclient/trunk@1721388 13f79535-47bb-0310-9956-ffa450edef68

httpclient-osgi/src/main/java/org/apache/http/osgi/impl/OSGiProxyConfiguration.java

@@ -27,6 +27,7 @@
 package org.apache.http.osgi.impl;
 
 import static java.lang.String.format;
+import static java.util.Arrays.asList;
 import static org.apache.http.osgi.impl.PropertiesUtils.to;
 
 import java.util.Dictionary;
@@ -135,7 +136,7 @@ public final class OSGiProxyConfiguration implements ProxyConfiguration {
     @Override
     public String toString() {
         return format("ProxyConfiguration [enabled=%s, hostname=%s, port=%s, username=%s, password=%s, proxyExceptions=%s]",
-                      proxyExceptions, enabled, hostname, port, username, password, proxyExceptions);
+                      enabled, hostname, port, username, password, asList(proxyExceptions));
     }
 
 }

httpclient-osgi/src/test/java/org/apache/http/osgi/impl/OSGiProxyConfigurationTest.java

@@ -0,0 +1,61 @@
+/*
+ * ====================================================================
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ * ====================================================================
+ *
+ * This software consists of voluntary contributions made by many
+ * individuals on behalf of the Apache Software Foundation.  For more
+ * information on the Apache Software Foundation, please see
+ * <http://www.apache.org/>.
+ *
+ */
+package org.apache.http.osgi.impl;
+
+import org.junit.Test;
+
+import java.util.Dictionary;
+import java.util.Hashtable;
+
+import static org.hamcrest.CoreMatchers.containsString;
+import static org.junit.Assert.assertThat;
+
+public class OSGiProxyConfigurationTest {
+
+    @Test
+    public void testToString() {
+
+        final Dictionary<String, Object> config = new Hashtable<>();
+        config.put("proxy.enabled", false);
+        config.put("proxy.host", "h");
+        config.put("proxy.port", 1);
+        config.put("proxy.username", "u");
+        config.put("proxy.password", "p");
+        config.put("proxy.exceptions", new String[]{"e"});
+
+        final OSGiProxyConfiguration configuration = new OSGiProxyConfiguration();
+        configuration.update(config);
+
+        final String string = configuration.toString();
+        assertThat(string, containsString("enabled=false"));
+        assertThat(string, containsString("hostname=h"));
+        assertThat(string, containsString("port=1"));
+        assertThat(string, containsString("username=u"));
+        assertThat(string, containsString("password=p"));
+        assertThat(string, containsString("proxyExceptions=[e]"));
+    }
+}