Sort Checkstyle modules

Author: garydgregory

src/conf/checkstyle/checkstyle.xml

@@ -19,27 +19,27 @@ limitations under the License.
     "-//Checkstyle//DTD Checkstyle Configuration 1.3//EN"
     "https://checkstyle.org/dtds/configuration_1_3.dtd">
 <module name="Checker">
-  <property name="localeLanguage" value="en" />
-  <module name="NewlineAtEndOfFile" />
-  <module name="Header">
-    <property name="headerFile" value="${checkstyle.header.file}" />
-  </module>
   <module name="FileTabCharacter">
     <property name="fileExtensions" value="java,xml" />
   </module>
-  <module name="RegexpSingleline">
-    <property name="format" value="\s+$" />
-    <property name="message" value="Line has trailing spaces." />
-    <property name="fileExtensions" value="java" />
+  <module name="Header">
+    <property name="headerFile" value="${checkstyle.header.file}" />
   </module>
+  <property name="localeLanguage" value="en" />
+  <module name="LineLength">
+    <property name="max" value="160"/>
+  </module>
+  <module name="NewlineAtEndOfFile" />
   <module name="RegexpSingleline">
     <property name="format" value="^\s+\*\s+@author\s" />
     <property name="message" value="Deprecated @author tag" />
     <property name="fileExtensions" value="java" />
     <property name="severity" value="warning" />
   </module>
-  <module name="LineLength">
-    <property name="max" value="160"/>
+  <module name="RegexpSingleline">
+    <property name="format" value="\s+$" />
+    <property name="message" value="Line has trailing spaces." />
+    <property name="fileExtensions" value="java" />
   </module>
   <module name="TreeWalker">
     <module name="AvoidStarImport" />