update the file at the configured manifest file path if it exists

[radditude]

This is a fix for a small bit of unexpected behavior when using Papers::ManifestUpdater.new.update! to automatically update the manifest during test runs.

Currently, if you configure a custom manifest file using

Papers.configure do |config|
  config.manifest_file = "config/my_awesome_manifest.yml"
end

calling Papers::ManifestUpdater.new.update! does not update that configured manifest file. Instead, it tries to update config/papers_manifest.yml.

This is easy enough to work around by passing the path like so:

Papers::ManifestUpdater.new("config/my_awesome_manifest.yml").update!

But that's kind of a bummer. It would be nice if the updater used the configured manifest file if one exists - I thought so, anyway, and I hope you agree! 😄

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}