release.sh in killbill-paypal-express-1.7.0 vs release.sh in killbill-paypal-express-1.7.1

@@ -1,32 +1,32 @@
 set -e
 
-if [ "GNU" != "$(tar --help | grep GNU | head -1 | awk '{print $1}')" ]; then
-  echo "Unable to release: make sure to use GNU tar"
+if [ 'GNU' != "$(tar --help | grep GNU | head -1 | awk '{print $1}')" ]; then
+  echo 'Unable to release: make sure to use GNU tar'
   exit 1
 fi
 
 if $(ruby -e'require "java"'); then
   # Good
-  echo "Detected JRuby"
+  echo 'Detected JRuby'
 else
-  echo "Unable to release: make sure to use JRuby"
+  echo 'Unable to release: make sure to use JRuby'
   exit 1
 fi
 
 VERSION=`grep -E '<version>([0-9]+\.[0-9]+\.[0-9]+)</version>' pom.xml | sed 's/[\t \n]*<version>\(.*\)<\/version>[\t \n]*/\1/'`
 if [ "$VERSION" != "$(cat $PWD/VERSION)" ]; then
-  echo "Unable to release: make sure the versions in pom.xml and VERSION match"
+  echo 'Unable to release: make sure the versions in pom.xml and VERSION match'
   exit 1
 fi
 
-echo "Cleaning up"
+echo 'Cleaning up'
 rake killbill:clean ; rake build
 
-echo "Pushing the gem to Rubygems"
+echo 'Pushing the gem to Rubygems'
 rake release
 
-echo "Building artifact"
+echo 'Building artifact'
 rake killbill:package
 
 ARTIFACT="$PWD/pkg/killbill-paypal-express-$VERSION.tar.gz"
 echo "Pushing $ARTIFACT to Maven Central"
 mvn gpg:sign-and-deploy-file \