replace capturing groups with non-capturing in RbTransform#to_s

[twalpole]

Instead of just removing all parentheses in RbTransform#to_s replace the capturing groups with non-capturing. This allows the use of the returned RbTransform object in more step definitions.

CAPTURE_MONEY = Transform /^(\$|£|€)(\d+)$/ do |currency, amount|
   ....
end

When /^I deposited (#{CAPTURE_MONEY})$/ do |money|
  ....
end

Without this change CAPTURE_MONEY.to_s returns $|£|€\d+ which will not match correctly in the step definiton. With this change it will return (?:$|£|€)(?:\d+) which will match correctly in the When step.

[mattwynne]

Great idea, thanks!

[twalpole]

@mattwynne glad you like it, makes transforms useful for me

[lock]

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