Test simpler regex and make template code simpler puppetlabs#1480

Author: HT43-bqxFqB

spec/classes/mysql_backup_mysqldump_spec.rb

@@ -82,7 +82,7 @@ class { 'mysql::server': }
 
         it {
           is_expected.to contain_file('mysqlbackup.sh').with_content(
-            %r{grep -v.*information_schema},
+            %r{information_schema},
           )
         }
       end

templates/mysqlbackup.sh.erb

@@ -81,7 +81,11 @@ cleanup
 <% end -%>
 <% if @backupdatabases.empty? -%>
 <% if @file_per_database -%>
-mysql --defaults-extra-file=$TMPFILE -s -r -N -e 'SHOW DATABASES' <% if ! @excludedatabases.empty? %> | grep -v '^\(<% @excludedatabases.join('|') %>\)$' <% end %> | while read dbname
+<% if @excludedatabases.empty? -%>
+mysql --defaults-extra-file=$TMPFILE -s -r -N -e 'SHOW DATABASES' | while read dbname
+<% else -%>
+mysql --defaults-extra-file=$TMPFILE -s -r -N -e 'SHOW DATABASES' | grep -v '^\(<% @excludedatabases.join('|') %>\)$' | while read dbname
+<% end -%>
 do
   <%= @backupmethod -%> --defaults-extra-file=$TMPFILE --opt --flush-logs --single-transaction \
     ${ADDITIONAL_OPTIONS} \