Convert ProcessOutput to String explicitly

The `filetype` provider executes `crontab` using Puppet's execution API, which
returns ProcessOutput objects that inherit from String. See puppetlabs/puppet@732d450

The provider later uses String#gsub to strip off the HEADER. In Ruby 2.7, the
gsub method returns a new instance of ProcessOutput:

    irb(main):002:0> Puppet::Util::Execution::ProcessOutput.new("# HEADER\n0 4 * * * /etc/init.d/script.sh\n", 0).gsub(/# HEADER/, '').class
    => Puppet::Util::Execution::ProcessOutput

If you later serialize the crontab entries to YAML using `puppet resource`, then
puppet warns about serializing unknown data types:

    # puppet resource cron --to_yaml
    Warning: Cron[unmanaged:/etc/init.d/script.sh-1]['command'] contains a Puppet::Util::Execution::ProcessOutput value. It will be converted to the String '/etc/init.d/script.sh'

This wasn't an issue with Ruby 3.2, because String#gsub always returns a String:

    irb(main):002:0> Puppet::Util::Execution::ProcessOutput.new("# HEADER\n0 4 * * * /etc/init.d/script.sh\n", 0).gsub(/# HEADER/, '').class
    => String

This commit explicitly converts the ProcessOutput to a String so the provider
behaves consistently on all Ruby versions.

Fixes #61

0 files changed, 0 insertions, 0 deletions