As part of this PR https://github.com/openfoodfoundation/openfoodnetwork/pull/10329
LocalisedNumber validation was tightened, but that means negative number
were not valid anymore.
This commit has been cherry-picked after this fix has already been
applied. Now we just change the order of characters in the regex because
humans are used to reading the minus at the beginning of the number. But
this change doesn't change the logic at all.
Rails 5.2 has changed the way initializers are called during certain rake tasks including `db:create`. Initializers that were previously not loaded are now loaded (basically the whole app is loaded). This means any calls to #table_exists? that appear in the app will throw fatal errors as the database doesn't exist yet during that task, but those calls are made before `db:create` has even started, which means the database can't be created.
There are also a few other places in Spree code where #table_exists? is called, and they already call #connected? first to guard against this issue.
DEPRECATION WARNING: ActiveModel::Errors#set is deprecated and will be removed in Rails 5.1. Use model.errors.add(:preferred_discount_amount, ["has an invalid format. Please enter a number."]) instead. (called from block (2 levels) in localize_number at /home/runner/work/openfoodnetwork/openfoodnetwork/lib/spree/localized_number.rb:38)
