more syntax error fixes

manifests/module.pp

@@ -9,7 +9,7 @@
 # This infrastructure, and therefore this define, is only available on Debian.
 
 define su_apache::module(
-  Enum ['present', 'absent'] $ensure  = undef,
+  Enum['present', 'absent'] $ensure  = undef,
 ) {
   if ($::operatingsystem != 'debian') and ($::operatingsystem != 'ubuntu') {
     fail("Unsupported su_apache::module operating system ${::operatingsystem}")