Fix error messages in tasks

Because of misplaced `"` no interpolation of the error message was
actually taking place.

Rubocop had been warning about this bug, but was deactivated in both
tasks (in different ways and by two different people)

tasks/export.rb

@@ -9,8 +9,8 @@ def get(file, database, user, password)
   cmd_string << " --user=#{user}" unless user.nil?
   cmd_string << " --password=#{password}" unless password.nil?
   cmd_string << " > #{file}" unless file.nil?
-  stdout, _stderr, status = Open3.capture3(cmd_string)
-  raise Puppet::Error, _("stderr: ' %{stderr}') % { stderr: stderr }") if status != 0
+  stdout, stderr, status = Open3.capture3(cmd_string)
+  raise Puppet::Error, _("stderr: '%{stderr}'" % { stderr: stderr }) if status != 0
   { status: stdout.strip }
 end
 

tasks/sql.rb

@@ -8,8 +8,8 @@ def get(sql, database, user, password)
   cmd << "--database=#{database}" unless database.nil?
   cmd << "--user=#{user}" unless user.nil?
   cmd << "--password=#{password}" unless password.nil?
-  stdout, stderr, status = Open3.capture3(*cmd) # rubocop:disable Lint/UselessAssignment
-  raise Puppet::Error, _("stderr: ' %{stderr}') % { stderr: stderr }") if status != 0
+  stdout, stderr, status = Open3.capture3(*cmd)
+  raise Puppet::Error, _("stderr: '%{stderr}'" % { stderr: stderr }) if status != 0
   { status: stdout.strip }
 end