Fix checkstyle: Suppress line length warning in CSVParser.

Author: aherbert

pom.xml

@@ -201,6 +201,7 @@ CSV files of various types.
         <configuration>
           <configLocation>${basedir}/checkstyle.xml</configLocation>
           <enableRulesSummary>false</enableRulesSummary>
+          <suppressionsLocation>${basedir}/src/main/resources/checkstyle/checkstyle-suppressions.xml</suppressionsLocation>
         </configuration>
       </plugin>
       <!-- Allow findbugs to be run interactively; keep in sync with report config below -->
@@ -270,6 +271,7 @@ CSV files of various types.
         <configuration>
           <configLocation>${basedir}/checkstyle.xml</configLocation>
           <enableRulesSummary>false</enableRulesSummary>
+          <suppressionsLocation>${basedir}/src/main/resources/checkstyle/checkstyle-suppressions.xml</suppressionsLocation>
         </configuration>
         <!-- We need to specify reportSets because 2.9.1 creates two reports -->
         <reportSets>

src/main/java/org/apache/commons/csv/CSVParser.java

@@ -501,8 +501,7 @@ private Headers createHeaders() throws IOException {
                         if (!emptyHeader && !this.format.getAllowDuplicateHeaderNames()) {
                             throw new IllegalArgumentException(
                                 String.format(
-                                    "The header contains a duplicate name: \"%s\" in %s. " +
-                                    "If this is valid then use CSVFormat.withAllowDuplicateHeaderNames().",
+                                    "The header contains a duplicate name: \"%s\" in %s. If this is valid then use CSVFormat.withAllowDuplicateHeaderNames().",
                                     header, Arrays.toString(headerRecord)));
                         }
                         if (emptyHeader && !this.format.getAllowMissingColumnNames()) {

src/main/resources/checkstyle/checkstyle-suppressions.xml

@@ -0,0 +1,23 @@
+<?xml version="1.0"?>
+<!--
+   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.
+-->
+<!DOCTYPE suppressions PUBLIC
+    "-//Checkstyle//DTD SuppressionFilter Configuration 1.2//EN"
+    "https://checkstyle.org/dtds/suppressions_1_2.dtd">
+<suppressions>
+  <suppress checks="LineLength" files="[\\/]CSVParser\.java$" lines="504"/>
+</suppressions>