Issue #451: add RegexpSingleline#lineLengthXml to checkstyle config

Author: Calixte

config/checkstyle-checks.xml

@@ -148,6 +148,13 @@
         <property name="fileExtensions" value="g, g4"/>
         <property name="message" value="Line should not be longer than 100 symbols"/>
     </module>
+    <module name="RegexpSingleline">
+        <property name="id" value="lineLengthXml"/>
+        <property name="format"
+            value="^(?!(\s*,?\s*&lt;a href=&quot;[^&quot;]+&quot;&gt;|.*http)).{101,}$"/>
+        <property name="fileExtensions" value="xml, vm, template"/>
+        <property name="message" value="Line should not be longer than 100 symbols"/>
+    </module>
     <module name="RegexpSingleline">
         <property name="id" value="cannot"/>
         <property name="format" value="can\s+not"/>

net.sf.eclipsecs.checkstyle/metadata/com/puppycrawl/tools/checkstyle/checkstyle-metadata.xml

@@ -5,7 +5,8 @@
 <checkstyle-metadata>
     <rule-group-metadata name="%Other.group" priority="1500">
 
-        <rule-metadata name="%Checker.name" internal-name="Checker" parent="Root" singleton="true" default-severity="warning">
+        <rule-metadata name="%Checker.name" internal-name="Checker" parent="Root" singleton="true"
+            default-severity="warning">
             <alternative-name internal-name="com.puppycrawl.tools.checkstyle.Checker"/>
             <description>%Checker.desc</description>
             <property-metadata name="cacheFile" datatype="File">

net.sf.eclipsecs.sample/src/checkstyle_packages.xml

@@ -4,11 +4,11 @@
     "-//Checkstyle//DTD Package Names Configuration 1.0//EN"
     "https://checkstyle.org/dtds/packages_1_0.dtd">
 
+<!--
+  Define here the Java packages where your custom Checkstyle module classes (checks, filters) are.
+  See https://checkstyle.org/config.html#Packages for more info.
+  -->
 <checkstyle-packages>
-    <!--
-      Define the Java packages where your custom Checkstyle module classes (checks, filters) reside here.
-      See https://checkstyle.org/config.html#Packages for more info.
-      -->
     <package name="net.sf.eclipsecs.sample.checks">
         <package name="dummysubpackage"/>
     </package>