fix escaping of expression

git-svn-id: https://svn.apache.org/repos/asf/maven/plugins/trunk@1607261 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/src/site/apt/examples/one-module-configuration.apt.vm b/src/site/apt/examples/one-module-configuration.apt.vm
index ba6d555..a483732 100644
--- a/src/site/apt/examples/one-module-configuration.apt.vm
+++ b/src/site/apt/examples/one-module-configuration.apt.vm
@@ -46,7 +46,7 @@
       <artifactId>maven-scm-publish-plugin</artifactId>
       <version>${project.version}</version>
       <configuration>
-        <content>${project.reporting.outputDirectory}</content><!-- mono-module doesn't require site:stage -->
+        <content>\${project.reporting.outputDirectory}</content><!-- mono-module doesn't require site:stage -->
       </configuration>
       <executions>
         <execution>