Added tail to pick proper echoed value

docs/src/main/asciidoc/ghpages.sh

@@ -83,7 +83,7 @@ function retrieve_doc_properties() {
         -Dexec.args='${docs.main}' \
         org.codehaus.mojo:exec-maven-plugin:1.3.1:exec \
         -P docs \
-        -pl docs)
+        -pl docs | tail -1 )
     echo "Extracted 'main.adoc' from Maven build [${MAIN_ADOC_VALUE}]"
 
 
@@ -93,7 +93,7 @@ function retrieve_doc_properties() {
         -Dexec.args="\${${WHITELIST_PROPERTY}}" \
         org.codehaus.mojo:exec-maven-plugin:1.3.1:exec \
         -P docs \
-        -pl docs)
+        -pl docs | tail -1 )
     echo "Extracted '${WHITELIST_PROPERTY}' from Maven build [${WHITELISTED_BRANCHES_VALUE}]"
 }