Fix missing escape and fix format

Author: HT43-bqxFqB

spec/classes/mysql_backup_mysqldump_spec.rb

@@ -75,12 +75,16 @@ class { 'mysql::server': }
       context 'with file_per_database and excludedatabases' do
         let(:params) do
           {
-            'file_per_database'  => true,
-            'excludedatabases'   => [ 'information_schema' ],
+            'file_per_database' => true,
+            'excludedatabases'  => [ 'information_schema' ],
           }.merge(default_params)
         end
 
-        it { is_expected.to contain_file('mysqlbackup.sh').with_content(%r{grep -v.*information_schema}) }
+        it {
+          is_expected.to contain_file('mysqlbackup.sh').with_content(
+            %r{grep -v.*information_schema},
+          )
+        }
       end
     end
   end

templates/mysqlbackup.sh.erb

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